looks like that video was shot in the detroit area. the fox theater and second city are on woodward across from comerica park. if those video's are fake, than someone went to a lot of trouble...there's a lot of stuff in those videos that most people wouldn't think to include in CG...that, and the quality of the video itself is pretty low budget. leads me to assume that if they didn't have the money to shoot the video right then they definitely didn't have the money to to the kind of vfx work it would take to integrate those doors the way they did. my guess is, the doors are real...but like rallyshark said "I'm pretty sure if you called them they'd ask you to send a downpayment for installation and then they'd disappear"...i'm thinking, they built those cars as "proof of concept" but that they work about as well as concept cars do at autoshows...those things work just enough to pass as functional for the press, after that they're nothing more that expensive (and shiny) paperweights.
This is a real ford project farmed out to a developer to see whats possible. Not CG. Most of the demo cars were destroyed but at least one made it, was sold on ebay last year. A little more research on the internet and you can find the discussion threads.
A really nice idea, my friend has a MKVIII and the doors are damn huge.