I don't know if it's old(never seen in a video)
The run up can start at the pink roof, just do a double bump in the small pole and land on the roof
Completely possible, I landed 2 times, the first I was too fast and couldn't stop on the roof(but I didn't fell of the bike in the end(and it's going to my next vid =P)), the second one I JUMPED off the bike by accident