I think Trish is spot on. As long as it is occasional and bub isnt plonked in front of the tv all day, which Im sure you wouldnt do then she will be fine!

The reality is tv is a part of our lives and I think it can be used sensibly with children. Izy has the Baby Mozart one and LOVES it and in fact I used it quite often in the afternoons when she was a bit younger because it was literally the only thing that would settle her enough for me to get dinner on for 30 mins or so! I use it about once a week now when she super unhappy.

I used to have the tv on, mainly for background noise all day but noticed that she would watch it quite a bit so have taken to turning it off and putting on music now and we dance and sing instead!!
Good luck and dont beat yourself up hun! If she loves it and you use it sensibly you have nothing to worry about!