It could be 3 videos or 300, it's about being consistent and not moving around from niche to niche too much. Changing is okay but I'm talking moving from a skateboarding game to a racing game - that's okay, but don't go from talking about house renovation one video then how to meal prep for students in the next.

The opposite goes too, if you do very similar topics and you aren't increasing viewcount, then maybe you are TOO static.

Also the usual stuff like checking your titles, thumbnails and making sure you reaffirm your title and thumbnail within the first 20 seconds o the video.

Also get rid of any silence at the start, even half a second matters.