I just had to tell you all how we made mistake & how we fixed it. My DD was TV-free until a couple months ago. I got pregnant and feeling icky made me weak and I started putting DVD's in so I could lay down and she would be entertained. At first it was no big deal. She would watch for a few minutes and then leave the room to play. We mainly watched Charlotte's Web and Toy Story so we'd talk about the animal. Then Valentines Day approached and my DH had big plans which included leaving DD with a sitter for the first time. I was nervous and had a "brilliant" idea to get her a new DVD. That DVD became my nightmare - ever since Valentines Day she started asking for it all day long. at first i let her watch it once a day, then i caved and let her watch it twice, then the tantrums started happening every time I said no. I literally felt like I couldn't survive the days - nothing I did was distracting DD from this DVD. Finally, she had a huge tantrum when DH was home. That was enough for him - he completely removed the TV. He hid the whole thing in the closet. And you know what happened - she hasn't asked for it since. The first couple days she would ask for it and we would point out that the TV was gone so we wouldn't be watching the DVD. And now it's been over a month and we have a happy daughter back. She plays with toys, makes a mess of the house, and we're happy.
So to anyone tempted to introduce the TV to their toddler to give themselves a little break, I highly advise against it. Obviously, not all kids will be like my DD but i guess you just can't know until you try it and this was not worth it to me.