Since this morning July 29 the opera extension FVD Downloader,
found in the sections `downloads' has disappeared.
It used to be here : https://addons.opera.com/en/extensions/privacy_policy/fvd-video-downloader/
and was listed as number 16. of alltime popular addons :
https://extensionrank.com/opera

It looks like the latest opera has introduced some problematic code . As a test i installed a older version of opera and chromium-codecs-ffmpeg-extra

ubuntu@ubuntu:~$ dpkg -l | grep opera-stable
ii  opera-stable                               74.0.3911.218                       amd64        Fast, secure, easy-to-use web browser
ubuntu@ubuntu:~$ dpkg -l | grep chromium
ii  chromium-codecs-ffmpeg-extra               87.0.4280.66-0ubuntu0.18.04.1       amd64        Extra ffmpeg codecs for the Chromium Browser
ubuntu@ubuntu:~$

And the same website npo.nl plays all media perfectly.

I installed opera-stable 75.0.3969.149 on Ubuntu 20.04 LTS (GNU/Linux 5.4.0-42-generic x86_64) together with chromium-codecs-ffmpeg-extra 89.0.4389.90-0ubuntu0.18.04.2 This combination of previous versions would let me play DRM video content just fine, Since April 10
i get the following error message :
DRM: KeySystem Access Denied! -- Key system access denied! Unsupported keySystem or supportedConfigurations.

More details of ubuntu system and browser :

Whenever a new opera version is availabe I do a fast check on a dutch website npo.nl, to see whether live streaming and watching old programs work. On Ubuntu 18.04 all works fine in combination with chromium-codecs-ffmpeg-extra.
Ubuntu 18.04 :
chromium-codecs-ffmpeg-extra_87.0.4280.66-0ubuntu0.18.04.1_amd64.deb
opera-stable_73.0.3856.344_amd64.deb
Ubuntu 20.04 :
chromium-codecs-ffmpeg-extra_1%3a85.0.4183.83-0ubuntu0.20.04.2_amd64.deb
opera-stable_73.0.3856.344_amd64.deb (same version)
On Ubuntu 20.04 the DRM protected video content refuses to stream and or play.

Any tips how to get the newest opera to work properly on the most recent LTS edition of Ubuntu ?

Since this morning July 29 the opera extension FVD Downloader,
found in the sections `downloads' has disappeared.
It used to be here : https://addons.opera.com/en/extensions/privacy_policy/fvd-video-downloader/
and was listed as number 16. of alltime popular addons :
https://extensionrank.com/opera