"Reaction" is a big one. I wonder if the beginning of the wasteland was YouTube trying to make "Reaction" videos a thing by directly encouraging that nonsense.

"vlog" is another word that seemed like a good idea at the time but seems to have degenerated into near uselessness as a marker of content.

In my opinion, a good indicator of pro "content creator" video is usually all capital letters/multiple question&exclamation marks in the title.

You can setup this matching quite easily with regex

Similarly, things like: /^Top \d+/, /^Best \d+/, /^Worst \d+/, /\d+ Things You (May|May Have)? Miss(ed)?/