Widevine is a “Content Decryption Module” (CDM) that provides Vivaldi with support for Encrypted Media Extensions (EME). EME are a form of Digital rights management (DRM) that are required by many, popular audio/video streaming services (Netflix, Amazon Prime, Spotify, Tidal, etc.).
To test Widevine support, go to demo.castlabs.com and attempt to play the videos that are tagged with “DRM”.
If DRM videos will not play, you will need to issue the following from a terminal (command prompt) and then restart the browser:
If the DRM test video will still not play, log a bug report stating that you run Linux and cannot play proprietary media. Mention your Linux distribution and distribution version.