Mpv is not playing all video files from youtube anymore, even though youtube-dl has no problem downloading them. I've tried with streamlink+vlc and it says that the video is protected so it gave me the culprit and it is not a regional protection in question but something else I don't understand.
E.g. this clip is protected https://www.youtube.com/watch?v=1pdGn4r1lD0&list=PL4vbGURud_Hr1HgxK0lq6o-3sqoc0Rx6l&index=2&t=1480s
Is there some way to modify mpv.conf and configure youtube-dl to download such clips for viewing in mpv?
Because you have youtube-dl installed, a possible workaround will be to stream the output of youtube-dl to the mpv player:
you can stream directly from youtube unto mpv by grepping direct video url