HDTenEightyP/NetNews huggingface dataset:
From: mjb@netcom.com (Martin Brown)
Subject: Re: NBC Artifacts: it's not compression!
Date: Fri, 14 Aug 92 07:03:31 GMT
Organization: Netcom - Online Communication Services (408 241-9760 guest)
Distribution: usa

In article <cchapman.98.712853866@matd.gatech.edu> cchapman@matd.gatech.edu (Charles H. Chapman) writes:
>In article <1992Aug01.164538.17370@lobo.rmhs.colorado.edu> jkrutz@lobo.rmhs.colorado.edu (Jamie Krutz) writes:
>>From: jkrutz@lobo.rmhs.colorado.edu (Jamie Krutz)
>>Subject: Re: NBC Artifacts: it's not compression!
>>Date: 1 Aug 92 16:45:38 GMT
>>In article <1992Jul29.191352.740@twg.com> edward@twg.com (Edward C. Bennett) writes:
>>>
>>>Can you give us a plain-English explanation of why we're see a strobing
>>>effect on fast motion?
>>>
>>>Thanks!
>>>-- 
>>
>>I think they're shooting with a high shutter speed, so there's little or no 
>>moton blur.  We're used to motion blur and 30fps sharp images look a bit 
>>"unnatural."
>>
>
>
>
>They use the same technique when broadcasting major league baseball games
>when they show a pitch from behind home plate.
>
>
>Chuck
>
>
>
>
>Charles H. Chapman  (GTRI/MATD)             (404) 528-7588
>Georgia Institute of Technology, Atlanta Georgia, 30332
>uucp:     ...!{allegra,amd,hplabs,ut-ngp}!gatech!matd!cchapman
>Internet: cchapman@matd.gatech.edu

With the electronic shutter on you get clear slo-mo replay, but you also
get strobing when viewing that camera live.

-- 

                                   - mjb -

                                mjb@netcom.com

Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: rec.video.satellite
Date:         Mon, 17 Aug 1992 14:17:00 CST
From:         "Daniel M. Swift" <SWIFT@DALLAS.ROCKWELL.COM>
Subject:      ABC Sports and College Football
X-To:         "homesat" <homesat@vm1.nodak.edu>

This weekend, I saw an interesting new "service" on G-Star 2-17.  It is
slated as the J. C. Penney In Store Broadcasting Network, AS WELL AS
ABC Sports!

The service is currently ITC.  Programming is mainly music-videos, as well
as commercials for clothing.  What I find interesting is the ABC Sports
commercials that also are there.  These commercials explain that starting
this fall, as a *Special* service to cable subscribers, ABC will be
providing nonlocal College Football games on a PPV basis.  Presumably these
will be the other regional feeds that ABC has for other sections of the USA
market.  A sidebar in the commercial emphasizes that the PPV games WILL HAVE
COMMERCIALS.

I wonder if this means that ABC is planning on taking away my Saturdays this
fall, by encrypting all of their regional football games?  This is certainly
their privilege, but it doesn't make me very happy.  Will Monday Night
Football be next to drop into the encryption arena?

These are my opinions only.

Dan Swift
swift@dallas.rockwell.com
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
X-Mailer: NMail (1.1.0)
Newsgroups: rec.video.satellite
Date:         Wed, 12 Aug 1992 10:39:04 EDT
From:         Gary Bourgois <flash@LOPEZ.MARQUETTE.MI.US>
Subject:      Re: August Dishcetra available now.
X-To:         HOMESAT@VM1.NoDak.EDU

--
    /   Gary Bourgois, WB8EOH, The Birdwatcher: Marquette Michigan  USA   \
   ([-o ~ Tune FRIDAY NIGHT LIVE!  S3/21 6.2. Fridays from 9-midnight ~ o-])
    \  Now a snazzy new DOMAIN address!  flash@lopez.marquette.mi.us      /
        GEnie: SIGNALS   FAX: (906) 228-7477    GWN BBS: (906) 228-4399
Newsgroups: rec.video.satellite
From: roberts@triton.unm.edu (Robert Smathers)
Subject: Re: Observations -- and my opinions on CNN INTL on SBS-6
Date: Tue, 18 Aug 92 02:33:54 GMT
Organization: University of New Mexico, Albuquerque
Distribution: na

In article <k_0mp5c@lynx.unm.edu> roberts@triton.unm.edu (Robert Smathers) writes:
>
>Observations first:
>
>I've noticed MOR MUSIC TV has started up (i.e. beyond the slate).  
>I had the slate listed in my addendum file, and I guess we should
>change that now.  It is ITC G6/10 with audio on 6.8 and barker
>(expanation of service) on 6.20.  Now if we could get them in
>stereo...

Oops... G5/10 should be the correct co-ordinates.  No excuse
for typing this at 8:30 pm.  8^)

Robert
roberts@triton.unm.edu

Newsgroups: rec.video.satellite
From: roberts@triton.unm.edu (Robert Smathers)
Subject: Re: Digital Music Express
Date: Thu, 13 Aug 92 00:40:56 GMT
Organization: University of New Mexico, Albuquerque
Distribution: usa

In article <4671@blue.cis.pitt.edu.UUCP> tjw@vms.cis.pitt.edu (TJ Wood) writes:
>In article <1992Aug12.164254.2495@clipper.ingr.com>, mgm@clipper.ingr.com (Mike Marfell) writes:
>
>>     Anyone have any idea how I can access the audio on Digital
>> Music Express (F4-19)? I checked out 5 - 8.5Mhz wide and narrow
>> with no luck. Could this be found via SCPC or FM squared? Any
>> help would be greatly appreciated! :-)
>
>are sent digitally via satellite.  At first I thought that they were offering
>to sell me a receiver and I could use my own dish, but then I figured out
>that I'd have to pay for cable TV and *then* pay the extra $15? per month.

DMX is delivered from satellite in digital format.  You will not
be able to receive it with analog audio reception methods (like SCPC,
FM2, regular audio subcarriers, etc).

As for having to buy cable just to get DMX...DMX has announced
plans to make it available to home dish owners sometime in 
the future.  I am not sure what the equipment setup with
be, tho.

BTW, talking about digital music providers... Digital Planet
has bit the dust.  (Just to correct Tracker Bob's statement
on LTR a few weeks ago).

Robert
roberts@triton.unm.edu
From: tjw@vms.cis.pitt.edu (TJ Wood)
Newsgroups: rec.video.satellite
Subject: Re: Digital Music Express
Date: 12 Aug 92 20:57:23 GMT
Distribution: usa
Organization: University of Pittsburgh

In article <1992Aug12.164254.2495@clipper.ingr.com>, mgm@clipper.ingr.com (Mike Marfell) writes:

>     Anyone have any idea how I can access the audio on Digital
> Music Express (F4-19)? I checked out 5 - 8.5Mhz wide and narrow
> with no luck. Could this be found via SCPC or FM squared? Any
> help would be greatly appreciated! :-)

The local cable company put one of the Digital Music Express fliers on my
door the other day.  It claims that there are 32 services and that they
are sent digitally via satellite.  At first I thought that they were offering
to sell me a receiver and I could use my own dish, but then I figured out
that I'd have to pay for cable TV and *then* pay the extra $15? per month.

I'd love to have the music service, but cable TV isn't worth the $$$.


Terry
Newsgroups: rec.video.satellite
From: aj008@cleveland.Freenet.Edu (Aaron M. Barnes)
Subject: Help with stereo processer bought from Alltronics
Organization: Case Western Reserve University, Cleveland, Ohio, (USA)
Date: Fri, 14 Aug 92 05:33:03 GMT


Okay-I bought this thing they advertised as a tv stereo processer
and I cant figure out how it works.Surplus so no dox.
I will describe it to you...
It is called the Studioline Stereo-Track 2.
The bacvck panel has a mryad of ins and outs.
Channel 3 or 4 in,cable in and out,FM in-out,cable b in-out,L and 
R out fixed,L and R out varible.
On the front is an infinite detent dial,a two digit green display,
and a three positon switch labled auto-off-man.

The electronic tuning goes from A1-A9 and then up to 40,but skips 23.

Please help me.

Thanks.
-- 
A.M.Barnes
aj008@cleveland.freenet.edu
WAMB-FM Cleveland-B93.5-Your almost part 15 powerhouse!
Coming soon-WAMB-TV 12-in stereo!
From: adammot@ltrnativ.UUCP (Adam Mottershead)
Newsgroups: rec.video.satellite
Subject: Auto Dish Peaking/Polarity Peaking
Date: Sat, 15 Aug 92 22:58:38 EDT
News-Software: FSUUCP 1.2 R4
X-Mailer: DigiQR 5.38b
Reply-To: adammot@ltrnativ.UUCP (Adam Mottershead)
Distribution: world
Organization: The All Ter Nah Tive Un Der Groend

Does anybody know if the GI 2650R has auto-dish and auto-polarity peaking?

--
Adam Mottershead                      |
39 Havelock Drive                     |
Brampton, Ontario                     |             adammot@ltrnativ.UUCP
Canada, L6W 4K8                       |
+1 416 454 8597                       |
                                                                          --
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: rec.video.satellite
Date:         Sat, 15 Aug 1992 09:56:10 -0700
From:         Bob Wier <rrw@TURING.CSE.NAU.EDU>
Subject: Re: "Artifacts" uncovered by archaeologists on satellite dig...
X-To:         HOMESAT@VM1.NoDak.EDU

 RE: Sci Fi Channel -
 The last I heard it was owned by USA. Does that mean commercials and
 endless lower right hand logos? Boy, I hope not (but USA may not be
 aware that us SciFi people can be VERY vocal when we don't like something
 :-)

--Bob Wier
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: rec.video.satellite
Date:         Fri, 21 Aug 1992 12:56:49 -0400
From:         Mike Gingell <aurs01!aurw6b!gingell@CONCERT.NET>
Subject: Re: Schedule for Let's Talk Radio

At last!. - Thanks Gary.  A question - whatever happened to Mark Long.  I
used to enjoy his show. His regular Weds 9PM timeslot is marked TBA in the
new Lets Talk Radio Schedule.

Mike Gingell, Alcatel, Raleigh, NC USA  (919) 850-6444
UUCP:       ...!mcnc!aurgate!aurfs1!gingell
Internet:   gingell%aurfs1%aurgate@mcnc.org
Newsgroups: rec.video
From: pjharris@gallua.gallaudet.edu
Subject: CLD-970 question...
Organization: Gallaudet University
Date: Mon, 17 Aug 1992 20:59:19 GMT

Is the CLD-970/980 a good machine?  What are its pluses/minuses?  I
have the opportunity to pick one up, but I need to know if it is worth the
effort.  By the way, that's a Pioneer CLD-970 or 980.  Thanx

Patrick

Xref: sparky rec.video:10192 rec.video.releases:2419
From: bates@kronos.arc.nasa.gov (Andrew Bates)
Newsgroups: rec.video,rec.video.releases
Subject: The LIttle Mermaid CAV LD For Sale
Date: 12 Aug 92 23:11:06 GMT
Distribution: usa
Organization: NASA/ARC Information Sciences Division


    I had a previous offer which fell through, so I am reposting this...

    FOR SALE:

    Special Limited Edition CAV Laserdisc of The Little Mermaid, still in
unopened shrinkwrap.  Asking at least $60, but I will take the best of
all offers in the next week.  This disc is no longer available, so act fast!

	Andy Bates.
From: bbs.hew@tsoft.sf-bay.org (Harold Wheaton)
Newsgroups: rec.video
Subject: Re: Need technical info on Teletext data service
Date: 15 Aug 92 02:24:49 GMT
Organization: The TSoft BBS and Public Access Unix, +1 415 969 8238

Vision@a.salford-software-services.co.uk writes:

> Definitely possible. Teletext adaptors for the BBC Microcomputer (I have
> one somehere) and PC compatibles (I think) were available in the UK (PAL).
> The BBC actually tried distributing software this way !

There is also a Teletext plug-in board (for IBM/clones) available in my 
area.  (Anyone interested should e-mail me.)  This board, though, is NTSC 
based and probably would not support PAL, but I could easily be wrong. :)

What I need to do is decide how to handle the ~5 Mbits stream for my 
project.  Plug-in board?  Parallel interface?  Serial interface?  
Naturally, I might need memory for my project as a buffer.
                                        -Harold

--
Harold Wheaton (bbs.hew@tsoft.sf-bay.org)
Newsgroups: rec.video
From: Reter@NIEHS.bitnet (Roy Reter)
Subject: Re: Star Wars LBX from Columbia House
Organization: CSC/NIEHS
Date: Thu, 20 Aug 1992 13:16:52 GMT

>
>Lets not get into a war on this.  My point is only that all three CH discs
>I received a few months ago from CH were defective.  It is also true that
>a lot of people who had gotten their discs from CH well before me have had
>NO problems at all.  Make of it what you wish.
>
>Steve
>

I just got mine two days ago, and have not had a problem (haven't watched ROTJ
yet though, that is on tonights agenda), but all seem great.  Does anyone know
if they have T2 in LBX,
available at CH?


Roy
From: brucer@gold.gvg.tek.com (Bruce Rayner)
Newsgroups: rec.video
Subject: Re: 8mm HiFi: Adaptor for RCA Jack -> Earphones?
Date: 14 Aug 92 20:46:56 GMT
Organization: Grass Valley Group, Grass Valley, CA

>>>I've got a question:  Can you get simple audio out of the camcorder by
>>>converting one of the audio-out RCA jack to a miniplug?  I've got both
>
>
>>Doesn't the 71 have an earphone output?  Most of these cameras do. 
>
>Nope.  (That's why I asked!  :)
>
>>It's lo Z where the RCA outputs have a Z of about 1K ohms.
>
>Whatsa "Z"?



Z is impedance, in ohms.  Earphones are typ 8 - 20 ohms, and require
more power than you might find at the line out. Before changing the 
jack, I'd get an adapter from Radio Shack to test your idea.  If you
need an amplifier, RS has a stereo listening aid device that could be
easily adapted to line input for an earphone amp.  (Would need the 
level reduced to mic level going in.)

Bruce

D
easily adapted to lin input for
Newsgroups: rec.video
From: gary@st.unocal.com (Gary Cattelino)
Subject: Re: SLV-R5 Problem - Help!
Organization: Unocal Corporation
Distribution: usa
Date: Tue, 18 Aug 1992 00:36:06 GMT

In article <Bt5D59.241@solbourne.com>, kucharsk@solbourne.com (William Kucharski) writes:
|> While reading article <1992Aug14.234924.1186@unocal.com>, I noticed that
|> gary@st.unocal.com (Gary Cattelino) said the following:
|>  >...Maybe my friends TV has more overscan than mine and thus doesn't show the
|>  >noise?
|> 
|> Most likely.
|> 
|> I have the TV in my bedroom set for a much lower amount of overscan than my
|> main set, since at least one of my VCRs produces the artifacts you describe
|> at the bottom of the screen when playing tapes.  I haven't tried bringing up
|> the bottom of my screen dramatically and using my SLV-R5 for playback, but
|> my Mitsubishi HS-413U VCR certainly spits out quite visible artifacts if I have
|> any I have anything below the second or third row of pixels from the bottom on
|> the "15 minute" disclaimer on CNN Headline News visible.
|> 
|> As to why these artifacts are present, I'm not sure.  Perhaps Mr. Video can give
|> us the technical details...


I did another test over the weekend.  I hooked up my TV from the
bedroom and the main TV to my SLV-R5 at the same time (one TV on
composite video, the other on S-video).  The bedroom TV did not show
any noise at the bottom of the screen, while the main TV displayed
the noise very clearly.  The only difference between the TVs is the
overscan.  You could clearly see the bedroom TV had more overscan
than my main TV and thus hid the noise.

My question is then:  Short of adding more overscan to my main TV,
is there any way to get rid of this noise?

I did get another response from the NET suggesting I adjust my height
control on the TV.  Anyone have any other ideas?

-- 
Gary A. Cattelino                  Unocal Corporate Information Services
Phone: (714) 693-6762              5460 E. La Palma Ave.
INTERNET: gary@unocal.COM          Anaheim, CA 92807
Newsgroups: rec.video
From: wlrc@uhura.neoucom.edu (William R. Cruce)
Subject: Re: Quality of Laser Disc players?
Organization: Northeastern Ohio Universities College of Medicine
Date: Sat, 22 Aug 1992 23:00:26 GMT

In article <BtDGF0.90E@news.cso.uiuc.edu> g-martin1@uiuc.edu (Gregory A. Martin) writes:
>I would like to ask anyone who has investigated Laser Disc players what
>distinguishes the expensive models from the cheap models? Are LD players
>similar to CD players where even cheap models give high quality output,
>and expensive models yield only modest improvements in output quality?
>I'm in the situation where I wouldn't mind paying $300 for a LD player
>but I don't want to pay $600. Any advice is greatly appreciated.

As with most things in audio/video (and life in general), you reach
a price point where the quality is "pretty good" and doubling the
price will not double your pleasure.  However, for the same price
there may be big differences in quality between brands.  We have a
big family and there is both a Pioneer 980 and 3070 in the house.
The 980 was recently available for the $300 price point, the 3070
originally was $1000+ (3 years ago).  They are very similar in their
image though the 3070 has a little lower noise and is a little better
able to handle problem and noisy discs.  But the 980 has a darned
good image.  For $300 you can get into laser discs and enjoy.


-- 
                 "So many windows, So little time"

Bill Cruce, N.E. Ohio Univ. Coll. of Medicine, Box 95, Rootstown, OH 44272
VOICE: 216-325-2511,  FAX: 216-325-0522,  INTERNET: wlrc@uhura.neoucom.edu
From: rjn@hpfcso.FC.HP.COM (Bob Niland)
Date: Fri, 21 Aug 1992 15:28:28 GMT
Subject: Re: 60 KHz Hum
Organization: Hewlett-Packard/WSY Ft.Collins,CO,USA
Newsgroups: rec.video

In rec.video, mandreol@ncrcan.Canada.NCR.CA (mandreol) writes:

> A couple of weeks back someone had posted something along the lines of having
> a hum when they turned on their stereo which was hooked up to their TV.
> Well, I just so happen to be having the same problem and its driving me nuts!

I may have that problem myself when I use my LP turntable (I haven't tried
disconnecting the cable to find out).  I suspect it is a ground loop
resulting from the fact that the cable TV feed coax shield is at earth
ground, which takes the VCR chassis to earth.  Because consumer
interconnects are are single-ended RCA jacks, they all are being dragged
down to earth, and some don't want to be.

Possible fixes include:
 - Disconnect everthing but the VCR and AMP. 
   As you add back components, try reversing the two-prong AC plugs.
 - Buy a coax isolator (I just saw one advertised in The Perfect Vision
   for about $60).
 - Build an isolator.  It seems like putting a couple of picofarad caps
   in series with both sides of the coax might do it.

Consumer grade splitters and similar RF gadgets tend to be common ground, so
they won't help.

Regards,                                              Hewlett-Packard
Bob Niland      Internet: rjn@FC.HP.COM               3404 East Harmony Road
                CompuServe:  71044,2124               Ft Collins CO 80525-9599

This article represents only the opinion[s] of its author, and is not an
official or unofficial position of, or statement by, the Hewlett-Packard
Company.  The text is provided for informational purposes only.  It is
supplied without warranty of any kind.
Newsgroups: rec.video
From: kucharsk@solbourne.com (William Kucharski)
Subject: Re: Features diff. between SLV595HF and SLV696HF?
Organization: Solbourne Computer, Inc., Longmont, CO
Distribution: na
Date: Wed, 19 Aug 1992 20:18:16 GMT

While reading article <1992Aug19.075430.25543@news.acns.nwu.edu>, I noticed that
tsaiwn@casbah.acns.nwu.edu (WenNung Tsai) said the following:
 >Hi,
 >	Can anybody out there briefly describe what the difference
 >between SLV595HF and 696HF?

The main difference is that the 696HF has a flying erase head.
-- 
| William Kucharski, Solbourne Computer, Inc.     | Opinions expressed above
| Internet: kucharsk@solbourne.com   Ham: N0OKQ   | are MINE alone, not those
| Snail Mail: 1900 Pike Road, Longmont, CO  80501 | of Solbourne Computer, Inc.
| President, "Just the Ten of Us" Fan Club        | "Dittos from Longmont, CO"
From: "lawrence kwan" <lawrence.kwan@canrem.com>
Newsgroups: rec.video
Subject: edit controller-info?
Date: 19 Aug 92 23:52:17 EST
Reply-To: "lawrence kwan" <lawrence.kwan@canrem.com>
Distribution: rec
Organization: Canada Remote Systems

I need some advice on purchasing an edit controller.

I currently have a Sony TR-81 and R5; so I am considering a Sony
controller. But I do not know the pros and cons of buying a third party
one such as those by Videonics, Azden, Futurevideos etc.  At present,
I do not need the accuracy of time code equipment; nor do I need one
with elaborate video processing features (I am still saving money for a
WJ-AVE5 and maybe eventually a toaster... ).

One thing I like about Sony controllers is the jog shuttle feature
which should be handy for controlling the camcorder - How well does this
work in reality?  When I was in Hong Kong, a salesman was trying to sell
me the new Sony RM-E500.  It looked similar to the E300/E700 but without
the titler function (not important to me).  He claimed that the E500 has
a "real" jog shuttle which the E300/E700 did not have.  Is there such
a thing as a "real"  jog shuttle?

Has anyone tried the Videonics "thumbs up"/"thumbs down" controller?
Somehow, it looks too simple; I wonder if it gives you enough control.
It has A/V fading; does it has S-video I/O?

Regarding the assemble editing feature, do the scenes have to be in
sequential order in the playback tape?
Are there any simple device which just do video fading with S-video I/O?

I would appreciate any advice/information.
Thanks in advance.

--
Lawrence
lawrence.kwan@canrem.com
--
---
  DeLuxe 1.25 #12199  
--
Canada Remote Systems  - Toronto, Ontario/Detroit, MI
World's Largest PCBOARD System - 416-629-7000/629-7044
From: bob@antares.intel.com (Bob Paauwe)
Newsgroups: rec.video
Subject: Re: Features diff. between SLV595HF and SLV696HF?
Summary: 696 features
Date: 20 Aug 92 11:31:12 GMT
Distribution: na
Organization: Intel Corp., Folsom, CA

In article <1992Aug19.075430.25543@news.acns.nwu.edu>, tsaiwn@casbah.acns.nwu.edu (WenNung Tsai) writes:
> Hi,
> 	Can anybody out there briefly describe what the difference
> between SLV595HF and 696HF?
> 	I remembered someone posted an article saying that SLV595HF is
> very very good. What I can see in magazines are the prices of them.
> But I would like to know if it is worth buying 696 insted of 595?
> Thanks in advance.
> Wennung

I just got a SLV696HF from Camera World of Oregan.  The price
difference between the 696 and 595 was $20.  The 696 has audio
and video insert editing and flying erase heads.  I think that 
is the only difference.  I think the flying erase heads are
worth $20.

Bob
-- 
Bob Paauwe                 ________________________    Any resemblence to a
bob@antares.intel.com                  |      REAL opinion is unintentional.
/-----------------___________________/---\___________________-----------------\
!ames!pacbell!sactoh0!bpaauwe        \___/      I'd rather be Gliding!!!!!
Newsgroups: rec.video
From: es1@cunixb.cc.columbia.edu (Ethan Solomita)
Subject: Re: Star Wars LBX from Columbia House
Organization: Columbia U., New York City
Date: Fri, 14 Aug 1992 22:59:56 GMT
X-Posted-From: cunixb.cc.columbia.edu
X-Posted-Through: sol.ctr.columbia.edu

In article <7970954@hpfcso.FC.HP.COM> rjn@hpfcso.FC.HP.COM (Bob Niland) writes:
>In rec.video, es1@cunixb.cc.columbia.edu (Ethan Solomita) writes:
>
>> Basically, it is like someone put a blue-green filter over a splotch in
>> the upper left, a red splotch in the center, etc.  It seems like a strange
>> kind of problem -- not one I'd associate with normal pressing.
>
>How does that disc look on another player (or even another TV).
>
>Color splotches on direct-view TVs are usually the result of having speakers
>(with their large magnets) too close to the CRT.
>
>It could also be a color decoding (probably a time base) error in your LD
>player, suggestion a rotational servo control problem.
>
	I've had 3 other people state that they had the problems
with their discs. Admittedly, my player had to be "adjusted"
after purchase, but it never did this before, and doesn't do it
to other discs.

	I also don't know anyone else with a laserdisc player, so
I can't test it.
	-- Ethan


purgamentum init, exit purgamentum
Newsgroups: rec.video