[beachy]

I would be interested to know what the technical difficulties are in scrubbing a banned video, and all derivatives, from a Facebook.

Are there practical AI/video analysis techniques to detect that a video contains a fragment of another video? Surely.

[aeternus]

There are, YouTube has a fairly effective algorithm that is used primarily to remove copyright-infringing content:

https://en.wikipedia.org/wiki/Content_ID_(algorithm)