I think it just throws the most engaging content at you hoping you get lured into using it more then the algo will update once it sees how you behave.

For me, it's almost all thirst traps for several years. More recently it learned that I like 90s/00s rock, which is a fad again, so it started showing me some of that. Also, I am a sucker for stand up comedy clips and it feeds me that now. So that was a hint that it does start to become more reasonable. But, if I start to scroll it only goes 3-5 posts deep before thirst gets put back in the rotation no matter what I do.

I've been using it more than ever in the last ~2 years, just because my old friends started sending me videos to the music related stuff so I click it and it opens in FB. We chat on messenger and I guess that little DM airplane logo is how they found a way to get me into it on occasion. Granted, my friends send me like 5-10 videos a day and I only watch them about once a month to get caught up, I can tell it's trying really hard to make a DAU out of me.