Just found this: Burning Man on youtube.
https://youtu.be/hvWVdfSoIqoSo far I can only watch it with Firefox and there is no sound. If I try to watch it with mpv I don't get any errors but it's just a black screen.
If I redirect the output by typing: mpv
https://youtu.be/hvWVdfSoIqo > bm.txt
then open bm.txt I can see the errors. Something about no trailing CRLF.