In theory, HDCP is supposed to prevent such use, by cryptographically verifying that the video isn't going to a device able to copy the media. Keys can be revoked by, say inserting a disc with a new set of revocations on it (alongside the media).

If you want to play such media, you have to license keys from Intel and show that your design is hostile to copying.

I was just thinking with vendors making hardware more hostile and if they made that not a possibility where an external camera defeats that. If a capture card works then that seems even easier and if youtubedl is under attack maybe that is how people will do it but one thing is for sure, people will do it.