‘Open by Default’ in app settings though I would have thought once you installed, it would have asked which app player you wanted to set as default. I always select ‘Just Once’ because sometimes popup player is preferred over video player or background.
Hopefully pictures are self-explanatory.
Note: Tubular is the sponsorblock fork of Newpipe.
https://universal-blue.discourse.group/c/bazzite/5
Discussion forum for the readers.