I know in the past that YouTube recognized, to some extend, if someone liked watching top 10/5 lists, and it would be more likely to suggest related videos in that format.
For example, if I watched a 'Top 10 RPG Games' video it would be more likely to suggest a 'Top 10 JRPGs' video to me (even from another channel) vs another (non list) video about RPGs. I don't watch a lot of list content anymore so it's hard for me to tell but I haven't seen those types of videos promoted nearly as much lately. In fact, it took a bit of searching last time I was hunting for particular 'Top 5 central' video and a few months ago YT wouldn't stop promoting those to me (and I wasn't a subscriber).
Just wondering, based on this, if perhaps YouTube has effectively removed (or was experimenting with removing, or decreasing the weight given to) the 'Top 10'/'Top 5' titles/tags in determining a video's relevance.
Hope that makes sense.