Hello,
You can download AV1 videos up to full HD with youtube-dl.
Code:
C:\Program Files (x86)\youtube-dl>youtube-dl.exe -F https://www.youtube.com/watch?v=w4LkSRXrK34 | findstr av01
395 mp4 426x240 240p 354k , av01.0.05M.08, 25fps, video only, 5.00MiB
396 mp4 640x360 360p 641k , av01.0.05M.08, 25fps, video only, 9.04MiB
397 mp4 854x480 480p 1013k , av01.0.05M.08, 25fps, video only, 14.51MiB
398 mp4 1280x720 720p 1796k , av01.0.05M.08, 25fps, video only, 26.29MiB
399 mp4 1920x1080 1080p 3042k , av01.0.05M.08, 25fps, video only, 45.78MiB
A quick test with "RED HDR Reel | Summer 2018 | Shot on RED" (Pentium G5400, Windows 10, ffplay) results in a few frames loss in quick moving scenes in 720p, much more pronounced in 1080p : 3 or 4 seconds freezes, not really watchable.
AiZ