I have noticed multiple YT content creators just casually mentioning things like "like and subscribe for the algorithm" and even "leave a comment for the algorithm", which people do, sometimes just saying "comment for the algorithm". One creator I remember did a "if you watched until the end comment 'boat'" or similar, which of course is again just baiting more comments. It also nudges recurring viewers who know that spiel to watch until the end, because they get to enjoy the dopamine from being one of the people who can comment the word. This increases watch time, which apparently is again one of the things the algorithm uses.

Maybe I have just become more attentive to these things or they have become more prevalent, but I notice this blatant optimization for the Algorithm(tm) more and more. I guess this is the meta you need to play in order to stand out/make it in the torrent of content that is YT or social media in general. I also see this as an example of Goodhart's law as creators try to optimize for reach and thus likes etc. while the original intention of the YT Algorithm(tm) was (or should have been) to serve you content you will enjoy.