From what I remember F1 and Indy cars are using pretty compact stuff. We occasionally get MotorWeek fillers at the PBSstation where I work. They had a whole segment one time on in-car cameras. What I found interesting was the video crews really liked NASCAR cars - - they could bolt in a full-size field cam back on the rear shelf.

The F1 cams were in a tiny bubble beside the drivers roll bar; looked no bigger than an old Instamatic camera. Then, with all of the cams, they had a satellite uplink that shot signal up and then was pulled down off the sat to the remote truck. Pretty cool. (Although I guess I didn't really answer your question, Santiago