Searching for information on single-piece garage door mechanism

[thevillageinn]

I wonder if anyone can help me with the geometry or some plans, in english, for a single piece garage door mechanism like in this video?

I am a tenant in a building where the front entry area needs to be replaced. I would like to install a single piece overhead door like shown, add a hinged walk through door to it as well for ease of use - my opening is approximately 7' wide by about 8' tall. I'd prefer not to have lots of greasy track running up and extending inside the building. I also like the way this door sticks out partially creating a little overhang to stand under.

Many thanks for any assistance you can provide-
-Dan