📖Sound and Picture Issues

In rare cases, you may come across the sound and picture issues in the media apps. For example, no sound or picture in the Video app.

A possible fix to that issue is the media codecs installation.

Open your Terminal and run:

sudo apt install ubuntu-restricted-extras

One more solution (not confirmed, but some say it works) is to install another media app via Flathub (for example, Celluloid) and then remove it if not needed.