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
Thanks for reaching out. If you still see videos in your Subs feed for more than a few minutes after you’ve unsubscribed, you may be experiencing an issue that we’re working to fix–should be resolved in the next 24 hours!