I won't lie I was pretty stupid for doing this because it was in the middle of the day. In my defence (if any) I wasn't being inherently dangerous to anyone other than myself and it was a large and completely empty parking lot, secluded from public road. The guy must've heard and walked towards me.
If you were to be charged, it wouldn't fall under the highway traffic act. Obviously, an element of the charge would require the act take place on a highway.
Whatever the charge may be, it would come from somewhere else. For example, there's Dangerous Operation of a Motor Vehicle, which would be a criminal offense.
The individual shooting the video will have to appear as a crown witness and give evidence.
The only applicable charge would be Dangerous Driving under the Criminal Code if it was done in a private parking lot. It's highly unlikely, they would lay such a serious charge.
At the most, they would show you the video and give you a warning. Part of the Roadwatch program allows police to tail.watch your vehicle/driving for a period of time to see if they can charge you on the road.