This is not a good example. He doesn't even put proper titles for his videos, how are people supposed to find them in an ocean of billions of videos? He seems to be doing it for his own satisfaction.
Nevermind that most of his videos are about a minute long and yt doesnt really like that.
It seems this person is not seeking to build a big audience at all. He just loves cats, and posts videos of them as part of his daily routine. If he was trying to build a big audience he'd operate very differently.