"Oi Hockey Stadium", the competition venue for Olympics, Hocky for the Tokyo 2020 Games, was completed in June 2019.
The footage was put together by pictures taken from the stationary camera fixed on the lighting tower used for night games installed at the south side of the construction site. The photos were taken from January 2019 until the construction was completed..
From this footage you may see with your own eyes the construction situation including the spectator stand, pitch and lighting tower.