Tv and baby

My 6 month old daughter is obsessed with the movie Moana.. it started off with me only letting her watch it when I had to clean, go to the bathroom, or etc. but the past 2 days she has been crying for no reason (she’s not teething) and I try everything to calm her down. But the only thing that works is if she watches Moana and she will watch it for over an hour.. is this normal? It honestly seems like she knows what she wants and is going to cry if she doesn’t get it..I don’t know if that’s possible at this age.