Hi, for a long time I have been unable to play embedded videos on facebook with th newest versions of Opera Beta on Ubuntu Linux, e.g. https://www.facebook.com/bosettisarah/posts/4094659607229685 .
The same videos played fine on Google Chrome.
Now I found https://forum.ubuntuusers.de/topic/opera-spielt-keine-facebook-videos
After
roland@hp:~$ locate libffmpeg.so|xargs ls -l
-rwxr-xr-x 1 root root 3456432 Nov 18 13:06 /snap/chromium/1411/usr/lib/chromium-browser/libffmpeg.so
-rwxr-xr-x 1 root root 3445640 Dez 3 22:20 /snap/chromium/1424/usr/lib/chromium-browser/libffmpeg.so
-rw-r--r-- 1 root root 1835752 Dez 1 22:43 /usr/lib/x86_64-linux-gnu/opera-beta/libffmpeg.so
-rw-r--r-- 1 root root 1835752 Dez 7 22:54 /usr/lib/x86_64-linux-gnu/opera/libffmpeg.so
-rwxr-xr-x 1 root root 2855920 Apr 1 2020 /usr/share/code/libffmpeg.so
-rwxr-xr-x 1 root root 2962992 Nov 19 12:57 /usr/share/skypeforlinux/libffmpeg.so
roland@hp:~$ cd /usr/lib/x86_64-linux-gnu/opera-beta/
roland@hp:/usr/lib/x86_64-linux-gnu/opera-beta$ sudo mv libffmpeg.so libffmpeg.so_orig
roland@hp:/usr/lib/x86_64-linux-gnu/opera-beta$ sudo ln -s /usr/share/code/libffmpeg.so .
It works fine now.
Please consider to upgrade the included libffmpeg.so on Linux.