I get that YouTube is attempting to pick through a torrent of stuff and that manual review is not feasible at such a scale. This is fine. This is self-evident.

Saying what video and when in the video tripped what part of the magic algorithm is also doable. I think we both understand that the algo has to do the work, and it has to output a "yes/no" at the end. However, absolutely nothing forbids coming up with some kind of feedback or error message. The algorithm is doubtlessly complex, and was therefore debugged. Yes/no was not sufficient for debugging in its development. The mechanisms are present.

Expose this to the user.