Nah, the uploader can turn that off if they want, which they tend to do on any popular video. I've resorted to screen recording, but even that is blockable with the (bullshit, shouldn't exist). "can't screenshot this due to security" API that exists on mobile operating systems now

You can point a camera at the screen, at least.

Once upon a time (around 2000) they tried to fix this by making cameras illegal except for licensed photographers.