I have an iPad mini. Sorry, I don't know what version. I got it last Xmas. Ever since I downloaded IO7 I too am having the hardest time watching videos on YouTube. They won't load. Doesn't matter if I access YouTube through the app, through a link on Safari, or a link in Facebook (which might be considered accessing it through safari). Dang videos just won't load. I have to back out of them, then try again. Then again. If I just sit and wait often they won't load at all. It isn't that they won't load, it is just that they are slow to the point of being maddening.
No trouble before this awful upgrade. I also have lost some apps that won't work now. Zynga app won't load at all. Why oh why did I download this thing?
And it isn't my internet speed. I'm getting 20 mps. Can't remember what router I use, but it worked fine with the old system.