It's October 1, 2019 and about 30 minutes ago I was using my Xbox360's YouTube app and all of a sudden I get an error and my xbox360, loses all it's apps including the YouTube App, I can't sign in no more, and my Xbox360 connects to my internet just fine but my account has either been corrupted by YouTube or a hacker or Microsoft stopped all support less than an hour ago.
Check to see if you can still patch your Xbox360 games because it is the 1st of this month, and usually some companies chooses new month to stop service on older systems. Like Netflix did to me in march 2019 by erasing a lot of movies I wanted to watch
without being able to sign into xbox live you can't ever watch YouTube videos or netflix or hulu anymore if they shut it down.
check yours to see if you can watch YouTube because chances are you can no longer use the Xbox 360 to patch or use online apps on it