There appear to be a number of techniques. Some of them pretty clever, motion control while time-lapse. Could be any number of rigs, the easiest would be with telescope tracking platforms.
Then there are the Jib-Arm shots that move over the cliff, it's involved to shoot, but the payoff is well worth it.
There are a number of smaller jib-arms that could accomplish this, and perhaps he had his trusty cinema-trained Guide to help.
The "Bee's Eye View" hovering through the foliage could be any number of steady-cam rigs with the camera mounted upside down dog's eye view mode.
Remember, this is travel eye-candy for those that love the woods. THey're going to put some bucks into it.
Quite beautiful stuff, would've liked to hear some of the environment, there's nothing like a babbling brook that actually babbles.
(just noticed the explanation at the bottom of this page, wasn't too far off)