If this is old hat, or otherwise inappropriate, lemme know, I will take it down.
This is a promotional video called "Sixes Last" created by a CGI/animation studio and production company called 1st Avenue Machine. So yah, pretty much fake, or to be more specific a lot of weird (and realistic!) CG superimposed on actual footage of real plants.
More of their work (nature-related and not), and a better-quality video, are available on their website, including this one, called "Quinn's":