In addition to what I wrote before, I've sort of just remembered the reason I'm really secretive about my channel.
When I was in high school, I was off sick for a few days and in those days one of my old "friends" decided that during computer class he'd bring up my channel to show a few people (before my channel was for gaming, and I did a bunch of vlogs, skits, random stuff on there) and I got a text or two from people about it. Apparently a few of them watched them in class and laughed about it (in a negative way), so when I got a text about it I immediately privatised all my videos and took the rest of the week off school. Not the response I wanted from my friends seeing my videos :/