Only downloads first audio stream from youtube

[adrusi]

This video appears to have multiple audio streams associated with it, meant to be played concurrently. When I play the video in mpv using its built-in youtube-dl integration, this video has audio, but not the voiceover track. The voiceover is present when playing it in the web player. The following is the output of --list-formats for the video:

[youtube] iqKdEhx-dD4: Downloading webpage
[youtube] iqKdEhx-dD4: Downloading video info webpage
[youtube] iqKdEhx-dD4: Extracting video information
[youtube] iqKdEhx-dD4: Downloading js player en_US-vflbh8HdB
[youtube] iqKdEhx-dD4: Downloading MPD manifest
WARNING: [youtube] iqKdEhx-dD4: Skipping DASH manifest: ExtractorError("Failed to download MPD manifest: HTTP Error 403: Forbidden (caused by <HTTPError 403: 'Forbidden'>); please report this issue on https://yt-dl.org/bug . Make sure you
are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)
[info] Available formats for iqKdEhx-dD4:
format code  extension  resolution note
249          webm       audio only DASH audio   57k , opus @ 50k, 12.72MiB
250          webm       audio only DASH audio   82k , opus @ 70k, 17.02MiB
140          m4a        audio only DASH audio  129k , m4a_dash container, mp4a.40.2@128k, 31.59MiB
171          webm       audio only DASH audio  130k , vorbis@128k, 26.48MiB
251          webm       audio only DASH audio  161k , opus @160k, 33.26MiB
256          m4a        audio only DASH audio  196k , m4a_dash container, mp4a.40.5, 48.18MiB
258          m4a        audio only DASH audio  388k , m4a_dash container, mp4a.40.2, 95.77MiB
160          mp4        256x144    144p  116k , avc1.4d400c, 24fps, video only, 27.70MiB
278          webm       256x144    144p  135k , webm container, vp9, 24fps, video only, 22.25MiB
133          mp4        426x240    240p  276k , avc1.4d4015, 24fps, video only, 61.19MiB
242          webm       426x240    240p  285k , vp9, 24fps, video only, 33.85MiB
243          webm       640x360    360p  517k , vp9, 24fps, video only, 61.75MiB
134          mp4        640x360    360p  634k , avc1.4d401e, 24fps, video only, 63.32MiB
244          webm       854x480    480p 1001k , vp9, 24fps, video only, 102.69MiB
135          mp4        854x480    480p 1160k , avc1.4d401e, 24fps, video only, 129.17MiB
247          webm       1280x720   720p 1821k , vp9, 24fps, video only, 205.04MiB
136          mp4        1280x720   720p 2319k , avc1.4d401f, 24fps, video only, 256.84MiB
248          webm       1920x1080  1080p 3237k , vp9, 24fps, video only, 394.65MiB
137          mp4        1920x1080  1080p 4368k , avc1.640028, 24fps, video only, 512.55MiB
271          webm       2560x1440  1440p 10482k , vp9, 24fps, video only, 1.22GiB
264          mp4        2560x1440  1440p 10572k , avc1.640032, 24fps, video only, 1.45GiB
313          webm       3840x2160  2160p 24496k , vp9, 24fps, video only, 3.87GiB
17           3gp        176x144    small , mp4v.20.3,  mp4a.40.2@ 24k
36           3gp        320x180    small , mp4v.20.3,  mp4a.40.2
43           webm       640x360    medium , vp8.0,  vorbis@128k
18           mp4        640x360    medium , avc1.42001E,  mp4a.40.2@ 96k
22           mp4        1280x720   hd720 , avc1.64001F,  mp4a.40.2@192k (best)

Compared to another video from the same source uploaded around the same time:

[youtube] GAPqEAWW9lc: Downloading webpage
[youtube] GAPqEAWW9lc: Downloading video info webpage
[youtube] GAPqEAWW9lc: Extracting video information
[youtube] GAPqEAWW9lc: Downloading js player en_US-vflbh8HdB
[youtube] GAPqEAWW9lc: Downloading MPD manifest
WARNING: [youtube] GAPqEAWW9lc: Skipping DASH manifest: ExtractorError("Failed to download MPD manifest: HTTP Error 403: Forbidden (caused by <HTTPError 403: 'Forbidden'>); please report this issue on https://yt-dl.org/bug . Make sure you
are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)
[info] Available formats for GAPqEAWW9lc:
format code  extension  resolution note
249          webm       audio only DASH audio   51k , opus @ 50k, 462.40KiB
250          webm       audio only DASH audio   68k , opus @ 70k, 592.99KiB
171          webm       audio only DASH audio  114k , vorbis@128k, 1015.99KiB
140          m4a        audio only DASH audio  127k , m4a_dash container, mp4a.40.2@128k, 1.15MiB
251          webm       audio only DASH audio  133k , opus @160k, 1.13MiB
160          mp4        256x144    144p  113k , avc1.4d400c, 24fps, video only, 1.01MiB
278          webm       256x144    144p  132k , webm container, vp9, 24fps, video only, 959.11KiB
133          mp4        426x240    240p  257k , avc1.4d4015, 24fps, video only, 2.24MiB
242          webm       426x240    240p  303k , vp9, 24fps, video only, 1.91MiB
243          webm       640x360    360p  550k , vp9, 24fps, video only, 3.45MiB
134          mp4        640x360    360p  635k , avc1.4d401e, 24fps, video only, 3.47MiB
244          webm       854x480    480p  925k , vp9, 24fps, video only, 5.97MiB
135          mp4        854x480    480p 1161k , avc1.4d401e, 24fps, video only, 6.67MiB
247          webm       1280x720   720p 1797k , vp9, 24fps, video only, 11.46MiB
136          mp4        1280x720   720p 2321k , avc1.4d401f, 24fps, video only, 12.50MiB
248          webm       1920x1080  1080p 3084k , vp9, 24fps, video only, 20.37MiB
137          mp4        1920x1080  1080p 3928k , avc1.640028, 24fps, video only, 22.02MiB
17           3gp        176x144    small , mp4v.20.3,  mp4a.40.2@ 24k
36           3gp        320x180    small , mp4v.20.3,  mp4a.40.2
43           webm       640x360    medium , vp8.0,  vorbis@128k
18           mp4        640x360    medium , avc1.42001E,  mp4a.40.2@ 96k
22           mp4        1280x720   hd720 , avc1.64001F,  mp4a.40.2@192k (best)

I am using the latest version of youtube-dl from the git repository.

[dstftw]

Downloaded video looks and sounds exactly the same as one in the webplayer for me.
Regarding playing in mpv contact mpv support.