My ds in also 1year and I let him watch TV when its on,he does not really seem that much intrested in it.
He will watch for a couple of minutes and then play with his toys.
I like putting on a sing a long DVD while he is playing and I want to do something else,cause then its not so quiet around him.
He likes to watch a fairytale when his sleepy though,makes him more drowsy....
Don't know what's too much tv