I have been accumulating a large number of videos and at present I have ~700GB in my iTunes Library. I have have not had any problems until now but today I cannot get either Apple TVs (I have one in the living room and one in my bedroom) to see my home PC's iTunes with Home Sharing. As I said everything was fine until today so I am pretty sure everything is setup fine. The only thing I can think of that has changed is the addition of some songs and videos since I last connected. Could my library bee too big? Does anyone have any ideas?