Yeah, I'm a little puzzled as to why they used such a mish-mash of machines, in that odd manner, to move the tree along. Maybe it was all they had available at the time?
Interesting to see how they lifted the tree straight up with cranes. Not a lot of people know, that a tree can be popped out the ground, easy as, with a direct vertical lift.
You can try pushing a tree down, and it'll fight you all the way. The reason being, that tree roots are designed to hold a tree upright, and resist wind forces - but there's nothing in the root system to stop a tree from being lifted straight up, vertically.