@_elena I love your video! Just have to say it again.
It works for me and I am behind a strict pi-hole and two active ad-blockers on Vivaldi.
But I got an overlay-message that roughly said "If you are having trouble watching the video report it <here>".
I could imagine that this is some kind of youtube filter to push down content they don't like to get more reach. Or an anti-ad-blocker strategy.