needhelp

I am not exactly sure what this feature is called nor remember what I did while uploading a video to have this problem created, but I was wondering if anyone knows how to remove it/stop it from coming up on a video as seen below. (Note: It occurs on all of my videos.) SCREENSHOT OF PROBLEM...

Hello people of this forum. I have reached 100 subscribers a little bit ago and i need a video idea on what to do. i am a gamer and i make mostly mc videos but i can do more games. Please give me suggestions. Channel link: www youtube com/c/greenbuellerMinecarft