I would highly suggest a book called The Armbruster Training Manual by Leonard Armbruster. It's the basis from which most of the training done on German versatiles are performed. You can google it and you'll find a few sources that sell the book. Not something you'll find on Amazon, but you should be able to find it from someone associated with the VDD.

It will cover everything you need. This is a book "literally" translated from German to English, so there are some nuances to work through. That said, if your goal is to have a truly versatile dog, this is the book.

As far as videos, just go to as many gun dog related websites as you can and start your collection. They will add very little value, but are extremely fun to watch.