I am able to stream content that I have purchased through Itunes using Apple TV with no streaming or connectivity issues however I am having trouble with content in Itunes on my computer. I am able to browse through the content using Apple TV but the streaming is terrible.
iOS 8.1.2
The following article(s) may help you.
Troubleshooting Wi-Fi networks and connections
Wifi Diagnostic Software (for Mac users)
You may also find some help on this page, where I’ve collected some of the more unusual solutions to network issues.
When making adjustments to your network for better optimisation, you may find some of the points mentioned on this page helpful.
Streaming problems with Apple TV
