He has a point about thinking of your own ideas, but at the same time subscribers aren't everything. I have basically no subscribers compared to my views, so I don't even think of subscribers most of the time. I also make random videos with not much theme (hence no subscribers). I still get views though.... Just do something that you like, or if you want a lot of views, what you think other people would like. If I saw someone post "hey, I just recorded myself belly flop onto concrete", I'm a guy, so I would naturally watch it and share if it's funny. No pressure to belly flop, but if you do let me know