https://www.cnet.com/news/boston-dynamics-robot-dog-spotmini-autonomous-navigation-mode/

The video description reads:

Before the test, the robot is manually driven through the space so it can build a map of the space using visual data from cameras mounted on the front, back and sides of the robot. During the autonomous run, SpotMini uses data from the cameras to localize itself in the map and to detect and avoid obstacles. Once the operator presses 'GO' at the beginning of the video, the robot is on its own.