[Samsung Galaxy Tab S5e Questions & Answers] lfrst05:
Just got my S5e 128GB WiFi and did some tests. Here are my results:

Media Playback:

All tests were done using VLC Media Player with "Automatic" hardware acceleration (default settings).

Working fine:

(for the first 4 tests the media was streamed over local WiFi from DLNA media server - without server-side conversion to other media format)

4k HEVC HDR10 24FPS 11.6 Mb/s + Dolby Atmos

General
Format : Matroska
Format version : Version 4
File size : 19.7 GiB
Duration : 2 h 29 min
Overall bit rate mode : Variable
Overall bit rate : 18.9 Mb/s
Encoded date : UTC 2018-08-08 22:00:25
Writing application : mkvmerge v25.0.0 ('Prog Noir') 64-bit
Writing library : libebml v1.3.6 + libmatroska v1.4.9

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Commercial name : HDR10
Format profile : Main 10@L5.1@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2 h 29 min
Bit rate : 11.6 Mb/s
Width : 3 840 pixels
Height : 1 608 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.078
Stream size : 12.1 GiB (61%)
Writing library : x265 2.8+1-478bfe2b7673:[Windows][MSVC 1914][64 bit] 10bit
Language : English
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0010 cd/m2, max: 1000 cd/m2

Audio #1
ID : 2
Format : MLP FBA 16-ch
Format/Info : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name : Dolby TrueHD with Dolby Atmos
Codec ID : A_TRUEHD
Duration : 2 h 29 min
Bit rate mode : Variable
Bit rate : 4 534 kb/s
Maximum bit rate : 6 930 kb/s
Channel(s) : 8 channels
Channel layout : L R C LFE Ls Rs Lb Rb
Sampling rate : 48.0 kHz
Frame rate : 1 200.000 FPS (40 SPF)
Compression mode : Lossless
Delay relative to video : 33 ms
Stream size : 4.73 GiB (24%)
Language : English
Default : Yes
Forced : No
Number of dynamic objects : 13
Bed channel count : 1 channel
Bed channel configuration : LFE

4k HEVC HDR10 24FPS 24.7 Mb/s + DTS-HD

General
Format : Matroska
Format version : Version 4
File size : 24.6 GiB
Duration : 1 h 56 min
Overall bit rate mode : Variable
Overall bit rate : 30.4 Mb/s
Encoded date : UTC 2017-03-27 19:33:32
Writing application : mkvmerge v10.0.0 ('To Drown In You') 64bit
Writing library : libebml v1.3.4 + libmatroska v1.4.5

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Commercial name : HDR10
Format profile : Main 10@L5@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 1 h 56 min
Bit rate : 24.7 Mb/s
Width : 3 840 pixels
Height : 1 606 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 (23976/1000) FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.167
Stream size : 20.1 GiB (81%)
Writing library : x265 2.3+23-97435a0870be:[Windows][GCC 6.3.0][64 bit] 10bit
Language : English
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level : 1529 cd/m2
Maximum Frame-Average Light Level : 380 cd/m2

Audio #1
ID : 2
Format : DTS XLL
Format/Info : Digital Theater Systems
Commercial name : DTS-HD Master Audio
Codec ID : A_DTS
Duration : 1 h 56 min
Bit rate mode : Variable
Bit rate : 2 119 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 16 bits
Compression mode : Lossless
Stream size : 1.72 GiB (7%)
Title : DTS-HD MA 5.1 @ 2119 kbps - Blu-ray EUR
Language : English
Default : Yes
Forced : No

1080P H264 24FPS 23.5 Mb/s + DTS-HD

General
Format : Matroska
Format version : Version 2
File size : 39.8 GiB
Duration : 2 h 58 min
Overall bit rate mode : Variable
Overall bit rate : 32.0 Mb/s
Encoded date : UTC 2017-07-23 15:23:21
Writing application : MakeMKV v1.10.6 win(x64-release)
Writing library : libmakemkv v1.10.6 (1.3.3/1.4.4) win(x64-release)
Cover : Yes
Attachments : cover.jpg

Video
ID : 1
ID in the original source medium : 4113 (0x1011)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Format settings, GOP : M=3, N=24
Codec ID : V_MPEG4/ISO/AVC
Duration : 2 h 58 min
Bit rate : 23.5 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.473
Stream size : 29.3 GiB (74%)
Language : English
Default : No
Forced : No

Audio #1
ID : 2
ID in the original source medium : 4352 (0x1100)
Format : DTS XLL
Format/Info : Digital Theater Systems
Commercial name : DTS-HD Master Audio
Codec ID : A_DTS
Duration : 2 h 58 min
Bit rate mode : Variable
Bit rate : 4 133 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 24 bits
Compression mode : Lossless
Stream size : 5.14 GiB (13%)
Title : Surround 5.1
Language : English
Default : Yes
Forced : No

1080p VC1 24FPS 26.3 Mb/s + DTS-HD

General
Format : Matroska
Format version : Version 2
File size : 26.6 GiB
Duration : 1 h 55 min
Overall bit rate mode : Variable
Overall bit rate : 33.0 Mb/s
Encoded date : UTC 2017-07-23 15:58:59
Writing application : MakeMKV v1.10.6 win(x64-release)
Writing library : libmakemkv v1.10.6 (1.3.3/1.4.4) win(x64-release)

Video
ID : 1
ID in the original source medium : 4113 (0x1011)
Format : VC-1
Format profile : Advanced@L3
Codec ID : V_MS/VFW/FOURCC / WVC1
Codec ID/Hint : Microsoft
Duration : 1 h 55 min
Bit rate : 26.3 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.529
Stream size : 21.2 GiB (80%)
Language : English
Default : No
Forced : No

Audio #1
ID : 2
ID in the original source medium : 4353 (0x1101)
Format : DTS XLL
Format/Info : Digital Theater Systems
Commercial name : DTS-HD Master Audio
Codec ID : A_DTS
Duration : 1 h 55 min
Bit rate mode : Variable
Bit rate : 4 210 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 24 bits
Compression mode : Lossless
Stream size : 3.39 GiB (13%)
Title : Surround 5.1
Language : English
Default : Yes
Forced : No

4K HEVC 60FPS 51.5 Mb/s (Samsung Power of Curve Demo - local media file on tablet)

ID : 0 (0x0)
Complete name : Samsung Power of Curve 4K Demo.ts
Format : MPEG-TS
File size : 1.17 GiB
Duration : 3 min 15 s
Overall bit rate mode : Constant
Overall bit rate : 51.5 Mb/s

Video
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.2@Main
Codec ID : 36
Duration : 3 min 14 s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Writing library : ATEME Titan KFE 3.6.1 (4.6.1.2)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 258 (0x102)
Menu ID : 1 (0x1)
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Format version : Version 4
Muxing mode : ADTS
Codec ID : 15-2
Duration : 3 min 14 s
Bit rate mode : Variable
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy

4K HEVC 60FPS 61.8 Mb/s (LG Journey to Space Demo - local media file on tablet)

General
ID : 0 (0x0)
Complete name : C:\Users\lukas\Downloads\LG Journey to Space 4k Demo\LG Journey to Space 4k Demo.ts
Format : MPEG-TS
File size : 550 MiB
Duration : 1 min 14 s
Overall bit rate mode : Constant
Overall bit rate : 61.8 Mb/s

Video
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
Codec ID : 36
Duration : 1 min 13 s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Writing library : ATEME Titan KFE 3.7.3 (4.7.3.1003)

Audio
ID : 258 (0x102)
Menu ID : 1 (0x1)
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Format version : Version 4
Muxing mode : ADTS
Codec ID : 15-2
Duration : 1 min 13 s
Bit rate mode : Variable
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy

4K HEVC HDR10 60FPS 51.6 Mb/s (Samsung Introducing Quantum Dot Display Demo - local media file on tablet)

General
ID : 0 (0x0)
Complete name : Samsung Introducing Quantum Dot Display Demo.ts
Format : MPEG-TS
File size : 726 MiB
Duration : 1 min 58 s
Overall bit rate mode : Constant
Overall bit rate : 51.6 Mb/s

Video
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : HEVC
Format/Info : High Efficiency Video Coding
Commercial name : HDR10
Format profile : Main 10@L5.1@High
Codec ID : 36
Duration : 1 min 57 s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Writing library : ATEME Titan File 3.7.3 (4.7.3.1002)
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0500 cd/m2, max: 1000 cd/m2

Audio
ID : 258 (0x102)
Menu ID : 1 (0x1)
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Format version : Version 4
Muxing mode : ADTS
Codec ID : 15-2
Duration : 1 min 57 s
Bit rate mode : Variable
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy

4K HEVC HDR10 60FPS 66.9 Mb/s (Samsung Chasing The Light Demo - local media file on tablet)

General
ID : 0 (0x0)
Complete name : Samsung Chasing The Light Demo.ts
Format : MPEG-TS
File size : 762 MiB
Duration : 1 min 35 s
Overall bit rate mode : Constant
Overall bit rate : 66.9 Mb/s

Video
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : HEVC
Format/Info : High Efficiency Video Coding
Commercial name : HDR10
Format profile : Main 10@L5.1@High
Codec ID : 36
Duration : 1 min 34 s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Writing library : ATEME Titan File 3.7.3 (4.7.3.1002)
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0500 cd/m2, max: 1000 cd/m2

Audio
ID : 258 (0x102)
Menu ID : 1 (0x1)
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Format version : Version 4
Muxing mode : ADTS
Codec ID : 15-2
Duration : 1 min 34 s
Bit rate mode : Variable
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy

Not Working:

4K HEVC HDR10 60FPS 71.4 Mb/s (Sony Swordsmith Demo - local media file on tablet).

(similar results as in this video: https://youtu.be/kOObpOw-V5U?t=254)

General
Complete name : Sony Swordsmith HDR UHD 4K Demo.mp4
Format : MPEG-4
Commercial name : HDR10
Format profile : Base Media
Codec ID : isom (isom)
File size : 735 MiB
Duration : 1 min 26 s
Overall bit rate mode : Variable
Overall bit rate : 71.6 Mb/s
Encoded date : UTC 2016-10-24 05:33:14
Tagged date : UTC 2016-10-24 05:33:14

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Commercial name : HDR10
Format profile : Main 10@L5.1@High
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 1 min 26 s
Bit rate : 71.4 Mb/s
Maximum bit rate : 114 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.144
Stream size : 733 MiB (100%)
Encoded date : UTC 2016-10-24 06:29:51
Tagged date : UTC 2016-10-24 05:33:22
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : R: x=1.000000 y=1.000000, G: x=1.000000 y=1.000000, B: x=1.000000 y=1.000000, White point: x=1.000000 y=1.000000
Mastering display luminance : min: 0.1000 cd/m2, max: 1 cd/m2
Codec configuration box : hvcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 min 26 s
Source duration : 1 min 26 s
Bit rate mode : Variable
Bit rate : 192 kb/s
Maximum bit rate : 197 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 1.97 MiB (0%)
Source stream size : 1.97 MiB (0%)
Language : English
Encoded date : UTC 2016-10-24 06:29:51
Tagged date : UTC 2016-10-24 05:33:22

EDIT: Jellyfish Demos

from http://jell.yfish.us/

4k HEVC HDR10 30FPS: working fine up to 200Mbps

4k H264 30FPS: working fine up to 200Mbps

WiFi:

Tested using Speedtest.net app on a stable internet connection (300Mbit/s down, 50Mbit/s up) using a 5GHz 802.11ac WiFi access point (Mikrotik hAP AC).

Distance to WiFi access point ~4m with one drywall in between. Each test scenario repeated 3 times.

Without touching the device: 100-120Mbit/s down, 50Mbit/s up

Holding the device in landscape (one hand bottom left): 40-80Mbit/s down, 50Mbit/s up

Holding the device in landscape (one hand bottom right): 110-140Mbit/s down, 50Mbit/s up

Holding the device in landscape (one hand top right): 100-140Mbit/s down, 50Mbit/s up

Holding the device in landscape (one hand top left): 100-120Mbit/s down, 50Mbit/s up

Comparison with Dell Precison 5510 Notebook (Intel 8260 WiFi adapter): 160-200Mbit/s down, 50Mbit/s up

Conclusion: Significant drop in download speeds by around 50% in my tests when holding the bottom left edge of the device in landscape. No significant change in upload speeds. The variation in all other tests should be normal WiFi fluctuations.

(Note: Speedtest.net is not good for a scientific test. A better option for a more representative test would be to use tools like iperf in the local network.)