Welcome to YT! I love your girls' names. Looking forward to seeing pictures.
Here are some free videos nicely put together by a YT member:
http://www.yorkietalk.com/forums/yor...cerella02.html
The only good DVDs that I have ever found are for Yorkie show coat grooming and they are very pricey. The other ones that I have bought, I don't have anything positive to say about them. YouTube is another place to search for some video grooming help.