Earlier quoted context omitted.
I mean, what's the flip side complaint? That a person posted a video that they didn't want to share, but as Unlisted, then forgotten the password to change it, then the video will be discovered, and it's compromising information but was uploaded to YouTube, and it comes back to harm that person? They're both pretty unlikely but at YouTube scale both are real.
It doesn't seem that unlikely. Someone makes a video of themselves with no clothes on (or whatever) and not fully understanding the privacy options they make it so it can only be shared to people they choose. 15 years later it's much easier to trawl through millions of videos by incrementing and check them automatically for nudity than anyone thought it would be back in the day.
There’s too many IDs to iterate through. Searching for $defatltvideoname for some camera is far more effective for that. Scarily so.