You're beginning to really worry me! Is anyone with some experience going to help you?
It sounds like you have a lot of money invested in this project and you could blow it real easy.
At the very least I would do two things. First, get one of these; http://www.amazon.ca/Bosch-83038-Del.../dp/B0000224KW it doesn't have to be a Bosch. There are others. Second go and buy a cheap door and jamb and practice hanging it so you understand how it all works.
That jig you show in the video is way over the hill. I have the Bosch jig and use it for big jobs but if you saw what I use for one or two doors the simplicity might cause you to faint.
As for the bevel edge, obviously cutting it flat is not an option. [BTW, a picture of what your jambs and doors look like would have helped everyone.] Make a small sample door and jamb with the same bevel and fit the hinge to it and see how it works for you. A bevel on the hinge side is not optimum but it is not a deal breaker. As long as the door stop will cover the gap created by the bevel it's doable. Hell, you could even set your jamb on the same bevel angle if you had the skill to do it.