As you may have heard about it that Google wants to remove the YouTube gaming website and its app.
YouTube has announced in September 2018 that they will remove the YouTube Gaming app and move everything to the main YouTube app and website.
For example, if you now go to gaming.youtube.com, you will get redirected to youtube.com/gaming.
That means that there is now a special section for gaming content directly on YouTube. No more dedicated app and website sadly.