Good vid I'll have to give tyre bumping a go
I have one wheel which is always a bitch what ever tyre I'm using. I try and get an angle on (I guess similar to what that guy in the clip is doing trying to think about the smallest circumference) ie push the opposite end of the loop of the tyre wire to the last bit you're trying to get on, to the opposite side of the rim to where you're trying to pop it over - so the two 'hoops' are at an angle to each rather than lying exactly on top of each other... if that makes any sense? Good luck!