Aloha ABUNDANT,
I'm assuming you are referring to the "essentials" DVD?
You will go by the technical front door, unless you block it off in some way. In the house shown, she was just walking through the way the owners and their friends all come in throughout the day. Seeing what was going on with the flow. Even though she'd use the technical front door for the time feng shui (unless it was able to be closed off), always coming into another door can have an effect on the energy coming into the house.
There are some houses with more than one "main" front door, and if another would align better with you and you change how UPS, girl scouts and everyone is naturally lead to the other, then it can be changed. If you live in an appartment with a room number on the door, or you have a pillar supported arched entry that direction-wise doesn't work in one of your four best directions, you're pretty much stuck with it unless you "tilt/rebuild the entrance."
Much Love, Shawn
