The user who posted the video reports that the gameplay was recorded on an early version of the RAGE engine. Apparently, this is an alpha version of the game, as there are fragments of digital code and some interface elements on the screen.
The content of the video in the picture resembles the fifth part of the series, but with improved detail. Most of the videos are dated 2020-21, so we can say that what was shown is an early build of the game.
Rockstar has already begun work to remove leaked videos, but the Internet remembers everything. You can download the videos here. There is also a version edited into one video, it can be downloaded here.