@lauren
Yes. It seemed to start earlier this week. It also doesn't show the thumbnail.

Some people can still post them so they play here. Perhaps people who leave in source reference.

@lauren Ah. So it's not just me. I thought it's a change on YT's side...

@lauren

Working okay for me.
(Vivaldi browser on MacOS.)

@lauren Yes. It's not just Mastodon. There are suggested fixes for servers.

https://stackoverflow.com/questions/79802987/youtube-error-153-video-player-configuration-error-when-embedding-youtube-video

@lauren I get those on occasion. I am unsure if it's some kind of rate limiting or what. It doesn't happen all the time, but it definitely happens a lot right after a video is posted.

153 appears to be a missing http referrer header error on an embedded video.

@lauren
On Android or desktop? On Android change to #Tubular or #Newpipe instead maybe?

@lauren

Yep. They don't play as of a month or more.

@lauren Works for me.