Search companies like Google reached the conclusion that search results need to be another form of infinite scrolling. They will spend little time doing real search and then flood the results with what they really want people to see.
And YouTube isn't really interested to improve their suggestions: when I say "Not interested" to a suggestion, they ask why not with two idiotic possible answers: a) I've already seen it or b) I don't like it.
If a) would be the case, they most of the time would know it and if b) would be the case, I would have seen it too and thus a).
Examples: I use Canon and Fuji gear for taking pictures, but they offer me Nikon or Sony related videos. If they would actually have some interest to optimize suggestions, they would offer me to say "I'm not interested in Nikon/Sony/whatever" … wouldn't they?
Or Amazon, offering me Sony lenses for my Fuji. Or more of Thing-X after buying some Thing-X yesterday. But I only need exactly one new Thing-X, which their stupid "AI" Rufus should know by now if their suggestion machinery didn't know it already ;-0
I’ve stopped using “not interested” because it’s so shitty and pointless. It has no effect whatsoever on the other videos YT decides to show me. I swear when I clicked “I’ve already watched this video” the Home Screen would show more previously-watched videos than before.
I aggressively nuke channels instead, and use a ublock script to hide anything with a red bar (which means I previously watched it).
Yep, the irrelevant videos are clearly targeted based on viewing history, but a completely separate topic from the search, and often with clickbait titles.
Tangentially related, I typically queue multiple videos, and within the past year YouTube has started inserting new videos into my queue. It’s always one by the same person of the currently playing video, placed next in the queue, and it only gets inserted after watching the current video for some period of time.
That last part made it difficult to diagnose. It’s extremely annoying and feels like gaslighting because it’s never a video I actually have an interest in watching.
The browser extension "Unhook" for YouTube gives you full customization of what content presentations display and auto play etc. Even allows to remove the home page, which is designed to distract. For phones, I recommend using your web browser instead of the app. Using your phone web browser also allows for using adblock so it's a double win minus the less usable interface
I pay for Youtube and see in the results a lot of irrelevant videos that have nothing to do with my search or viewing history.
But it gets so much worse. I leave the "smart downloads" feature enabled in Youtube Music on my phone because sometimes it discovers and downloads some gems for me. Again and again it downloads "artists" and music genres that I went out of my way to never have to listen to. To add insult to injury it sometimes refuses to delete those playlists for hours after I click the button. One time I had to clear all the downloads just to remove that trash.
There is no "organic" explanation for this as much as I'd dig for one. This is Youtube taking money to push a product.