Good News! Found a site that talks about the old Opera, the substitution of the libffmpeg.so file fix, and a workaround.
[link text]https://newbedev.com/opera-your-browser-does-not-currently-recognize-any-of-the-video-formats-available(link url)
As far as full disclosure - I have not followed the steps... so as usual: YMMV. I've been using a different browser of late. Looks promising though.
HTH.