If I have some embarrassing/damning video I want to post online you can bet your ass I'm going to scrub off any metadata.

If there could be some repercussions (e.g. police brutality, gang violence, whistleblowing, etc.) I'm going to go above and beyond to make it not traceable to me. And you're here asking the government to make it a law to make all video outputs traceable to the creator?

Perhaps you should apply to the NSA or Palantir.