After some experiments, I discovered a simple video camera mount that seems to work: a tripod jammed behind the seats! Surprisingly, the video image is nice and steady. This test video is a drive onto Eastern Avenue heading to Rocky Neck, the well-known summer artists' colony in Gloucester, with the Madfish Grille (a laid-back waterfront bar and grille) as a final destination. 

You can see the five-minute video on You Tube at: http://bit.ly/qZ6Fw1