This is a post I really should have gotten up earlier as some of the techniques in it are already outdated with newer versions of mpv and mesa. Still, I felt it was important to document some of this, and I'll probably do a followup with the newer methods in the future.
https://battlepenguin.com/tech/how-to-play-videos-in-hdr-on-linux-for-a-home-theater/
This is something that's bothered me for years, even before some of the most recent news events involving ID verification and data breaches.
Stop just letting people scan your ideas for silly reasons. Don't upload your ID to any mobile app. Learn why and how to protect yourself: