The article you linked makes a surprising claim, and it contradicts what the EFF said recently about this here - https://www.eff.org/deeplinks/2021/08/apples-plan-think-diff...

> Currently, although Apple holds the keys to view Photos stored in iCloud Photos, it does not scan these images

It also seems weird that the EFF wouldn't have complained about this before if Apple was known to be doing server-side scanning for some time now.

I also am not going to watch through an hour video, but I scanned the transcript and I didn't see anything that said that Apple currently (at that time) scanned content.