Apple TV problems

Could anyone help? My Apple TV is behaving a little oddly.

Firstly, Airplay connections just result in the loading screen (circle of white lines) and never actually start.

Also, Youtube videos will not play (same loading screen), but Netflix will.

My music is listed, but there is no album artwork, and again things don't play.

In the iTunes Store, again artwork is not downloading, but it will fully load the correct screen and artwork if I choose a song, and it will play the preview.

So it is not simply a network connection as it is doing some things that require a network, and it is doing them quickly.

Very confused, any help much appreciated!