I've recently updated my Apple TV (3rd generation), model A1469, to 7.6 (8130). But now it freezes when pausing YouTube videos. Others have the same problem. Here are some reports and discussions:
How can I downgrade to 7.5? Can I download Apple TV software 7.5 from an official Apple server?
The instructions on the first link above point to https://ipsw.me/product/AppleTV, but this is not an official Apple site.