Very nicely done....I like that you really focused on your subject matter and avoided the temptation to "show off" the maneuvers of the Phantom...no 'swoops', wild swings, etc...just some great photos of a unique place. The net effect was that you made me want to go there....and that is what good video is all about. I liked that you included some cars, people, etc. (the swimmers at the falls was especially nifty!)...those all helped to give the shots a sense of scale. And, I thought the way you used some of the low-flying abilities of the Phantom, around that tree...were very well done, as was the 'trip' down that bamboo lined road...
The couple of things that I might suggest...one would be to underexpose by about 1/3 stop, I think this would give the colors more saturation and depth. I don't know if you are using a photo editor that would let you do this, but I think it's always a lot easier to do that art the time of filming. Secondly...some titling would be good, to give your viewers a bit more information about the location, time of year, etc.
I hope to see more from you...or send me a ticket to Hawaii, so can see...and film....some of the beauty myself..!!