format code  extension  resolution note
249          webm       audio only DASH audio   54k , opus @ 50k, 1.48MiB
250          webm       audio only DASH audio   73k , opus @ 70k, 1.96MiB
140          m4a        audio only DASH audio  128k , m4a_dash container, mp4a.40.2@128k, 3.78MiB
171          webm       audio only DASH audio  128k , vorbis@128k, 3.57MiB
251          webm       audio only DASH audio  140k , opus @160k, 3.87MiB
160          mp4        256x144    144p  115k , avc1.4d400c, 25fps, video only, 3.12MiB
278          webm       256x144    144p  122k , webm container, vp9, 13fps, video only, 2.95MiB
242          webm       426x240    240p  237k , vp9, 25fps, video only, 4.52MiB
133          mp4        426x240    240p  258k , avc1.4d4015, 25fps, video only, 6.94MiB
134          mp4        640x360    360p  382k , avc1.4d401e, 25fps, video only, 7.66MiB
243          webm       640x360    360p  431k , vp9, 25fps, video only, 7.90MiB
244          webm       854x480    480p  738k , vp9, 25fps, video only, 12.31MiB
135          mp4        854x480    480p  802k , avc1.4d401e, 25fps, video only, 15.48MiB
247          webm       1280x720   720p 1380k , vp9, 25fps, video only, 22.41MiB
136          mp4        1280x720   720p 1505k , avc1.4d401f, 25fps, video only, 29.85MiB
248          webm       1920x1080  1080p 2305k , vp9, 25fps, video only, 39.06MiB
137          mp4        1920x1080  1080p 2653k , avc1.640028, 25fps, video only, 55.62MiB
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)