Watermarks with detection in cameras and scanners, be it the simple EURion constellation[1], ContentArmor[2] or the watermarking techniques developed by Denuvo, these things exist.
Some directly prevent you from photographing the content or filming it, others tell the camera to add identifying information steganographically. Even others are only used for ContentID. All of them work even if the material is going through analog copying.
Also [1], which relies on watermarking audio of content, which then can be detected by hardware players and the playback can be stopped if it discovers that e.g. you play a BluRay rip from USB stick. It survives encoding with different codecs. I'm not sure if it has been cracked yet or not.
Appears to be 'cracked' as far as is possible- i.e, can remove the watermark itself, but not possible to undo the degradation to the original signal that the watermarking introduces.
You don't need a camera. Just buy the right "HDMI splitter" which splits one hdmi signal into several. Some of them, for a seemingly arbitrary reason, also strip off HDCP and then you can just record the clean unencrypted HDMI signal. I obviously can't tell you which exact models to get, but a quick googling will.
