Since gaming now lives at http://YouTube.com/gaming , the old Gaming app is going away on May 30th! If you were subscribed to channels in the Gaming app, they’ll automatically move to your YouTube subs feed on May 14th. More need-to-know info→ https://yt.be/help/yRe4
You know @ThatMumboJumbo is part of the gaming community, you should probably do your job and help him with the 400 false copyright claims @WarnerChappell issued. And while you’re at it fix the copyright system.