I have had a problem with videos that are wavy, like jello, from day one with my Phantom 3 Advanced...it is amazingly consistent I have to admit....look at the 6:10 mark in full screen and HD for 5 to 10 seconds....talk about wavy!

It appears to be pretty windy.. The p3 can handle some pretty strong winds but you won't get perfect picture with a 20 mph gust..  I can tell by the your p3's landing leg it's fighting allot of wind and I know that because of how much I see it in the cameras view

Like said, looks like it was very windy at the point you go the mad jello ( 6:10 ). Even after that you can see the trees move a lot..  Try making another video when its less windy/gusty to see.

Sweet video