When you want an easy solution. I'm building ffmpeg.so packages for archlinux for the different opera flavours. Since these are statically linked they should be usable on any linux distribution.
The packages can be found at http://repo.herecura.eu/
You can browse the packagelist where you should be able to find:
opera-ffmpeg-codecs-*
opera-beta-ffmpeg-codecs-*
opera-developer-ffmpeg-codecs-*
Most of the time the versions are the matching versions where the opera branch was based on. For developer the versions might divert a bit due to issues in the chromium source.

This has worked perfectly! I just extracted the libffmpeg.so file straight into /usr/lib/x86_64-linux-gnu/opera-beta and it started working. Thanks a lot

See this and this comments in Opera's Desktop Blog.
A possible solution.

The "possible solution" link worked wonders! Thanks a lot. This has solved my problem

When you want an easy solution. I'm building ffmpeg.so packages for archlinux for the different opera flavours. Since these are statically linked they should be usable on any linux distribution.
The packages can be found at http://repo.herecura.eu/
You can browse the packagelist where you should be able to find:
opera-ffmpeg-codecs-*
opera-beta-ffmpeg-codecs-*
opera-developer-ffmpeg-codecs-*
Most of the time the versions are the matching versions where the opera branch was based on. For developer the versions might divert a bit due to issues in the chromium source.

This has worked perfectly! I just extracted the libffmpeg.so file straight into /usr/lib/x86_64-linux-gnu/opera-beta and it started working. Thanks a lot

That goes beyond my technical understanding, sorry. However, this is also affecting other users so I hope they will fix it soon.

There doesn't appear to be a mention of npapi or flash packages. Did you file a bug report?

Seems odd. Do youtube live streams play at all? Are they using the old or new player?

Did you enable the "Canonical partners" source from the "Another software" tab in the software and updates app? Once you enable that you can install adobe-flashplugin package with synaptics or apt. This solved it for me.

Hi everyone!

I am unable to play many web videos, and I believe those are HTML5 video elements, since youtube is using the flash player to play live streaming.

Here is an example of a video I can't play https://www.instagram.com/p/BQDvvpAgyzc/

This has been broken for me every since Beta 43 came out and it hasn't been fixed yet.

I DO have the ffmpeg package installed, as well as the chromium-ffmpeg-extra package.

Any ideas?

Thanks a lot!