Repository: youtube-dl
Issue: youtube-dl doesn't see the video file if page contains YouTube trailer
Labels: site-support-request

### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2018.01.21*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
- [x] I've **verified** and **I assure** that I'm running youtube-dl **2018.01.21**

### Before submitting an *issue* make sure you have:
- [x] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
- [x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones

### What is the purpose of your *issue*?
- [x] Bug report (encountered problems with youtube-dl)
- [ ] Site support request (request for adding support for a new site)
- [ ] Feature request (request for a new functionality)
- [ ] Question
- [ ] Other

---

### The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your *issue*

---

### If the purpose of this *issue* is a *bug report*, *site support request* or you are not completely sure provide the full verbose output as follows:

Add the `-v` flag to **your command line** you run youtube-dl with (`youtube-dl -v <your command line>`), copy the **whole** output and insert it here. It should look similar to one below (replace it with **your** log inserted between triple ```):

```
youtube-dl -v https://www.kinofondas.lt/filmas/laikinai-/
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.kinofondas.lt/filmas/laikinai-/']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2018.01.18
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.16299
[debug] exe versions: ffmpeg N-86950-g1bef008, ffprobe N-86950-g1bef008
[debug] Proxy map: {}
[generic] laikinai-: Requesting header
WARNING: Falling back on generic information extractor.
[generic] laikinai-: Downloading webpage
[generic] laikinai-: Extracting information
[download] Downloading playlist: Laikinai
[generic] playlist Laikinai: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[youtube] XCm5U-fneMo: Downloading webpage
[youtube] XCm5U-fneMo: Downloading video info webpage
[youtube] XCm5U-fneMo: Extracting video information
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[debug] Invoking downloader on 'https://r8---sn-uxv-8ovl.googlevideo.com/videoplayback?itag=136&pl=20&mime=video%2Fmp4&keepalive=yes&mm=31&mn=sn-uxv-8ovl&aitags=133%2C134%2C135%2C136%2C160%2C242%2C243%2C244%2C247%2C278&gir=yes&requiressl=yes&mt=1516740784&mv=m&ei=EaFnWreeMtHb7ATevpzABw&ms=au&ip=<MY_IP_EDITED>&key=yt6&lmt=1425717181198456&dur=64.833&expire=1516762481&clen=12092425&beids=%5B9466592%5D&id=o-AIrFBjioNpOUWgiP4XgLbtEzJEdpb9JfQvGv-S0as8k7&source=youtube&initcwndbps=873750&sparams=aitags%2Cclen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&ipbits=0&signature=53AC0D6CE479425418ACC6DFD053D239913A655D.89313904B6B52353C80B0C3CD6A7A986A002FF85&ratebypass=yes'
[download] Destination: LAIKINAI trailer-XCm5U-fneMo.f136.mp4
[download] 100% of 11.53MiB in 00:18
[debug] Invoking downloader on 'https://r8---sn-uxv-8ovl.googlevideo.com/videoplayback?itag=251&pl=20&mime=audio%2Fwebm&keepalive=yes&mm=31&mn=sn-uxv-8ovl&gir=yes&requiressl=yes&mt=1516740784&mv=m&ei=EaFnWreeMtHb7ATevpzABw&ms=au&ip=<MY_IP_EDITED>&key=yt6&lmt=1432463668288276&dur=64.881&expire=1516762481&clen=963948&beids=%5B9466592%5D&id=o-AIrFBjioNpOUWgiP4XgLbtEzJEdpb9JfQvGv-S0as8k7&source=youtube&initcwndbps=873750&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&ipbits=0&signature=A86794240E36291A9F1566749AB552479FBF50F5.82B89C05D2151EDC8E8B82121D6ECA8E7EAC8D37&ratebypass=yes'
[download] Destination: LAIKINAI trailer-XCm5U-fneMo.f251.webm
[download] 100% of 941.36KiB in 00:04
[ffmpeg] Merging formats into "LAIKINAI trailer-XCm5U-fneMo.mkv"
[debug] ffmpeg command line: ffmpeg -y -i "file:LAIKINAI trailer-XCm5U-fneMo.f136.mp4" -i "file:LAIKINAI trailer-XCm5U-fneMo.f251.webm" -c copy -map "0:v:0" -map "1:a:0" "file:LAIKINAI trailer-XCm5U-fneMo.temp.mkv"
Deleting original file LAIKINAI trailer-XCm5U-fneMo.f136.mp4 (pass -k to keep)
Deleting original file LAIKINAI trailer-XCm5U-fneMo.f251.webm (pass -k to keep)
[download] Finished downloading playlist: Laikinai
```

---

### If the purpose of this *issue* is a *site support request* please provide all kinds of example URLs support for which should be included (replace following example URLs by **yours**):
- Single video: https://www.kinofondas.lt/filmas/laikinai-/ (click yellow play icon in the middle of the page)

Note that **youtube-dl does not support sites dedicated to [copyright infringement](https://github.com/rg3/youtube-dl#can-you-add-support-for-this-anime-video-site-or-site-which-shows-current-movies-for-free)**. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

---

### Description of your *issue*, suggested solution and other information

e.g. this page has no YouTube trailer https://www.kinofondas.lt/filmas/filmas-8-minutes/ so youtube-dl downloads the movie the fine. Under --list-formats it lists one file with format mp4 and resolution unknown.

Same scenario, but a page with YouTube trailer included e.g. at https://www.kinofondas.lt/filmas/laikinai-/ and it downloads only the trailer from YouTube. It's not a coincidence, I tried multiple other pages that has no trailer and they all work, but as soon as there a page with YouTube trailer, the movie file gets ignored and only the trailer is downloaded, it also sees only YouTube formats under --list-formats.

tldr: somehow youtube trailer is blocking the video.