This is a giant sequoia video from the USA.
From Associated Press in the USA:
Redwood in Remote Northern Calif. Forest Measured as Tallest Living Thing at 378.1 Feet
Two amateur California naturalists found the tree earlier this summer during a bushwhacking expedition in search of tall trees.
Chris Atkins, credited with discovering the Stratosphere Giant in 2000, and Michael Taylor returned later with scientists to obtain more exact measurements of the tree’s height using a tripod-mounted laser.
Officials would not pinpoint the exact locations of the trees out of concern that too many visitors could damage the delicate ecology of the mild, foggy slopes where the trees live.
Scientists have developed a mathematical model that predicts the maximum height trees can reach in particular environmental conditions: here.
Big trees, like the old-growth forests they inhabit, are declining globally: here.