Poor Gitup Git1, it's microphone couldn't cope with the noise!
If you want fun at low speed, you can do better than that, try a Caterham (Lotus) 7, then you only need 1st gear:
yeah i think that video may have been what convinced gitup to look into making the microphone level adjustable. the car really wasn't that loud, i guess it was just teh cheap (and shaky) suction mount transmitted a lot of vibration directly to the chassis of the camera, and it was just the right frequency to really resonate the mic. after i finished, and was cruising off course somewhere around 3000rpm, the annoying buzz was almost completely gone.
there were some 7 replicas at most of our events. one blue one had a custom license plate that said "K 2 RUM".
another had an S2000 drivetrain, which was hilarious as the huge red valve cover was sticking up through the hood!
first gear only? i have to disagree with you - seems reverse gear was featured quite prominently! and loads of handbrake to boot. which is no small feat when you're sitting on the rear axle - the moment of rotation feels completely different than most other cars where you're seated ahead of the rear axle. if you're not used to it, you'll be backwards before you realize you're spinning.
as for usage of forward gears, it depends on the club you race with and the size of the lot you have to work with. i've run courses where i was teasing the limiter in 3rd in my old miata, and i've done some entirely in first as well, like the one below. very twitchy and nervous-feeling, but still fun. just too short when you're used to having 50-80 second courses.
that was recorded with an early digital camcorder, which was about the size and shape of a huge smartphone today - used 2x AA batteries, full size SD card, and had a flip-out USB connector to plug directly into the PC for data xfer. i picked it up from the clearance bin for about $18 when CompUSA or one of those stores was going out of business. it only did vga resolution, but the size was much more convenient than the "full size" Digital8 camcorder i had been using.