The world of nature documentary films is riddled with aimless, uninformative visual feasts. Even the high-budget ones often fall prey to this purposelessness.
This documentary has the noble distinction of following a subject closely : the phases of tropical rainforest growth. It approaches the main concepts and gives interesting examples along the way. However, the vulgarization remains heavy and the vocabulary remains generic and nontechnical, so don't expect a university lecture.
The aerial drone images are impressive. Flying though the branches of majestic trees with a cinematic image quality was unfeasible before the advent of drones, and the movie delivers in that regard. (And keep an eye out for the film's biologist, hiding perched in the branches at vertiginous heights.)
Many of the scenes are also augmented with schematic-style animations. Some of it is excessive, like the awkward flocks of butterflies, but many animations were well-executed, such as seeing the roots of ancient trees as if our vision pierced the ground.
The film succeeds in giving us a general perspective on the age and complexity of rainforests. Their timescale is that of centuries, but they can be destroyed in a day : the message is clear.
