Didn't sound or look like a particularly aggressive pass to me. Video tends to make passes look closer than they actually are, and I didn't hear anything other than standard engine rev-up when matting the throttle of a car with an automatic transmission.
Interesting that the motorist was looking back to see the reaction from the cyclist. Seems to me like the best strategy in these situations is not to dignify the motorist's antisocial behaviour with a response--but that's easy for me to say and a lot more difficult to do.