This one's definitely a case of "let me count the ways"
Not owning the lane, being a dick in the lane he wasn't owning, one handed riding when he knew things were about to get hairy, being a bigger dick when the taxi responds to his provocation, taking the time to ride one handed some more so he can make gestures at the taxi IN THE MIDDLE OF THE INCIDENT, not riding a bike with decent mirrors on the highway.
This dude was way lucky, he came real close to stepping up to claim his Darwin award, and probably blames it all on the taxi.
You don't often get to walk away from doing that many things wrong.