YouTube Live is not working in VRChat

[MutsumiIsedaFilot]

Checklist

• [] I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2019.04.30
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

C:\Users\Xxxxx>"C:\Program Files (x86)\Steam\steamapps\common\VRChat\VRChat_Data\StreamingAssets\youtube-dl.exe" --verbose https://www.youtube.com/watch?v=PdE1y-MgKzU
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=PdE1y-MgKzU']
[debug] Encodings: locale cp932, fs mbcs, out cp932, pref cp932
[debug] youtube-dl version 2019.04.30
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17763
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] PdE1y-MgKzU: Downloading webpage
[youtube] PdE1y-MgKzU: Downloading video info webpage
[debug] Default format spec: best/bestvideo+bestaudio
[debug] Invoking downloader on 'https://r4---sn-3pm7kn7l.googlevideo.com/videoplayback?id=o-APs7ZtVpoFr1ILmmDUHJiSiXkvZr3J8MEw-JIy760muZ&itag=18&source=youtube&requiressl=yes&mm=31%2C29&mn=sn-3pm7kn7l%2Csn-3pm7sn7s&ms=au%2Crdu&mv=m&pl=18&ei=n9nTXIu6GsGMgQOztbTgBA&gcr=jp&initcwndbps=1538750&mime=video%2Fmp4&gir=yes&clen=476641601&ratebypass=yes&dur=14466.542&lmt=1556978093169547&mt=1557387553&fvip=2&c=WEB&txp=5531432&ip=153.142.88.197&ipbits=0&expire=1557409279&sparams=ip%2Cipbits%2Cexpire%2Cid%2Citag%2Csource%2Crequiressl%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cei%2Cgcr%2Cinitcwndbps%2Cmime%2Cgir%2Cclen%2Cratebypass%2Cdur%2Clmt&signature=C6C7314E9832553F2D77F3C3221A7AE5453593F3.4E4D7413676AEC54F6EEE346CFA0633470994267&key=yt8'
[download] Destination: Relaxing Cafe Music - Jazz & Bossa Nova Music - Instrumental Music For Work, Study-PdE1y-MgKzU.mp4
[download] 100% of 454.56MiB in 01:06

C:\Users\Xxxxx>
C:\Users\Xxxxx>
C:\Users\Xxxxx>"C:\Program Files (x86)\Steam\steamapps\common\VRChat\VRChat_Data\StreamingAssets\youtube-dl.exe" --verbose https://www.youtube.com/watch?v=fLovQ0j4WwY
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=fLovQ0j4WwY']
[debug] Encodings: locale cp932, fs mbcs, out cp932, pref cp932
[debug] youtube-dl version 2019.04.30
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17763
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] fLovQ0j4WwY: Downloading webpage
[youtube] fLovQ0j4WwY: Downloading video info webpage
[youtube] fLovQ0j4WwY: Downloading m3u8 information
WARNING: unable to extract channel id; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] fLovQ0j4WwY: Downloading MPD manifest
[debug] Default format spec: best/bestvideo+bestaudio
[debug] Invoking downloader on 'https://manifest.googlevideo.com/api/manifest/hls_playlist/id/fLovQ0j4WwY.0/itag/300/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D298/hls_chunk_host/r4---sn-3pm76n7r.googlevideo.com/playlist_type/CLEAN/ei/9NnTXJSxFoKi4QKS1oOYCg/force_finished/1/gcr/jp/initcwndbps/11580/mm/32/mn/sn-3pm76n7r/ms/lv/mv/m/pl/18/dover/11/keepalive/yes/mt/1557387691/disable_polymer/true/ip/153.142.88.197/ipbits/0/expire/1557409364/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,playlist_type,ei,force_finished,gcr,initcwndbps,mm,mn,ms,mv,pl/signature/7E8BB7813DC86932861CFC73542A316F347B6EAE.3039D6DAA274321732C4D514325BF47F8589EAF3/key/dg_yt0/playlist/index.m3u8'
[download] Destination: safariLIVE - Sunrise Safari - May 09, 2019-fLovQ0j4WwY.mp4
ERROR: m3u8 download detected but ffmpeg or avconv could not be found. Please install one.
  File "__main__.py", line 19, in <module>
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\__init__.py", line 474, in main
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\__init__.py", line 464, in _real_main
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 2008, in download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 807, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 861, in process_ie_result
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 1642, in process_video_result
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 1915, in process_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 1854, in dl
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\downloader\common.py", line 364, in download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\downloader\external.py", line 35, in real_download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\downloader\external.py", line 226, in _call_downloader
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\downloader\common.py", line 165, in report_error
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 624, in report_error
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfeq7l785\build\youtube_dl\YoutubeDL.py", line 586, in trouble

Description

WRITE DESCRIPTION HERE

Videos can be played correctly in VRChat.
But LiveStream is not working.
Please, fix it.

[dstftw]

Bother to read the error message.