YouTube thumbnail playlist is gray

Grey boxes = skeleton load. That happens to me if I try using Safari on Mac, FireFox on Linux or Windows. YouTube has gotten to the point it really loves and prefers you to use Chrome and nothing else.

 

Try visiting m.youtube.com in a web browser and see if it works, at least until they 'fix' their app? I haven't used the app since like 2014.

 

Not the app, nope. I just use m.youtube.com in a browser. That way I'm not forced to constantly update the app all the time. Also keeps the Google account off my phone. You do know you can use adblock in Samsung's browser, right?

The app no longer works on older Android versions anyway so on my SII I have to use the website. In fact it draws the site to mirror the UX of the phone and I quite like it. You should see what m.youtube.com looks like on an HTC G1!