Twitter video not playing

Leap 15.4 on desktop and laptop, laptop fresh install with fresh home directory.
On Twitter videos flash a picture of the video, then shows an error dialog saying The media could not be played. Wit a button labeled reload.
Rinse repeat.
The video plays fine on a W10 machine.
I’ve installed all the codecs I see, from Packman.
Any ideas on how to proceed.

You should do the “Vendor Switch” to Packman. Not just install what you assume you need.

zypper dup --from <the alias, or name, or number of the Packman repo>

Worked on both computers.