That is a great video! It just goes to show that no matter how good you are as a caller, there are times when the turkeys are just not going to come and give you an opportunity. Still, those kinds of calling interactions with turkeys are what spring gobbler hunting is all about, regardless of the end result.
In terms of learning to cutt, I agree with SteelerFan about the mechanics of the air flow,...sharp, forceful burst of air from you diaphragm,...and just saying "cut" should create the sound you want,...if you have the right call to start with. All calls are not created equal in terms of the sounds you can make with them. Put the right call in your mouth and you will probably be very surprised at how much difference it will make.