If it distracts her while she's eating, either wait until she latches to turn it in or don't watch tv while she eats.
No, you're not going to ruin her. That's just silly. She's discovering things that are interesting to her senses, which is a good thing. My kid finds window blinds fascinating. If she's having a meltdown and iturn her to face the windows,she chills out almost immediately. They find things that are pleasing to them, which is normal and good. TBH, I don't see her being mezmerized by the tv as any different than her liking a mobile over the crib at that age, which is moving pictures and shapes meant to soothe. If she reacts the same way to the tv, that's hardly surprising.
Now, if you used the TV as a baby sitter or she were older and fighting you when you tell her to turn it off, that would be a problem.