Where's my Flying Car ? - Prof Simon
He does a good retrospective*, and then runs the video clip.
I'm left wondering what the difference is just abaft the front wheel wells on the left and right. The latter has a dark panel with a hatch above it, the former has no hatch but a raised scoop for air intake.
*Except.... He mentions the Ford Levacar not needing a highway? It was a hovercraft than ran on a polished steel roadbed at an altitude of something like a hundredth of an inch.