A pretty cool video and a really interesting guy.
When you were interviewing him it would have been better IMHO to get him standing, or sitting still and then, subsequent to the interview pick up close ups of the things he was talking about so that you could overlay them on the audio. It was quite frustrating having him talking about things which you couldn't then see.
Don't show moving from one element to another as if you had a camera strapped to your head. Do a cut away and set up properly for the next shot. "Here's the car" tripod shot of car, pan, tracking what ever, cut away to a detail. "Here's the interior" show the interior.
Watch comparable style videos on TV, Top Gear perhaps. You will find that most shots are no more than two or three seconds.
Use the skills you have learnt from still photography. Look for and compose the shot, consider if it would be a good looking still image. Be aware of lighting and depth of field in the same way as you would a still image. If the image would make a ****e (Geordie speak) still it will make ****e looking video.
Hope this helps.