Every year Office Max has an Elf Yourself video. It changes a little every year, and it's super easy. You upload pictures of your family or friends and it puts them in a video. These are super funny and always a hit around our house. Go here to get started! It's totally free.
Another family favorite is the Santa video from the portable north pole. This lets you select specific things about your child, so it's like Santa is making a video just for them. It includes their name, age and you can upload a picture also. You even get to pick if they are on the nice, naughty or mostly nice list. You can do it for adults too!
We do one for my husband every year and put him on the naughty list. My kids think it's hysterical. Go here to get started. The video is e-mailed to you and you can watch it with your family. Again it's free, and we all love free!
(Thanks, Desert Chica Ramblings!)