This isn't fully "Hidden" but I've always wondered if Ai scraping is the reason why short form videos on Youtube/TikTok/Instagram featuring film/tv clips will sometimes have 2 audio tracks... one with the actual audio from the clip a little louder and one audio track with a computer generated narrator providing running commentary of what is happening and why. As a human I'm able to tune it out but it is very weird/jarring.
In case anyone hasn't had the displeasure of viewing these I'll link some in a comment below once I scroll through my feed and find one.
I thought it was done to keep the video from getting taken down due to copyright (with automatic scanners). I also noticed sometimes videos will have a horizontal line that runs through it -- I've assumed that it wouldn't get flagged for copyright violation.
Isn’t that the audio description (AD) track? Maybe it’s mixed in because of an encoding error.
I'd guess it's more a way to avoid YouTube's copyright detection/etc rather than AI scraping per se.