There's no capability in my kitchen to play DVDs so, based on that, they're not an option for me. However, I much prefer the hands-on convenience that cookbooks afford. I like to read and re-read ingredients and instructions, which translate to a lot of on/off and flipping of a DVD player if I use a DVD.
As someone else already mentioned, I would rather view cooking on television via the food channel, etc. when I'm not cooking.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!