Youtube not playing again...

Since an update a few days ago Chromium on Bookworm and Wayland have
stopped playing YouTube videos. Another update today touched on things
like ffmpeg (and more) but playback still doesn't seem to work.

The page loads, the progress bar fills in and mousing over the bar
produces thumbnails, but the display window is blank white, mostly.

I've seen some references to YouTube complaining about ad blockers
and I use Ublock Origin consistently, but there have been no
grumbles about it on my machine.

In addition, Firefox and videos on the New York Times main page
do much the same thing, so it isn't unique to YouTube. For the
moment I'm guessing it's a botched update. If somebody happens
to know better please post!

Thanks for reading,

bob prohaska