A few days ago YouTube stopped playing on all my iOS devices: iPhone 5s, iPad Air and iPad 2. This happens exclusively on wifi...YouTube plays fine on cellular service. All were running iOS 10.1.1. I've since updated to 10.2 with no solution. I can start the YouTube app, see my favorites, suggestions, etc, but when I click on the Go button all I get is the circular arrow going around. After searching this question for a day or two the only thing I've learned is that this bug goes back to iOS 8 or so. Thanks, Jim