Just a team of ten robot dogs pulling a truck (in neutral) up a 1° slope.
Nothing to worry about here, citizen. Skynet will protect you.
From the video caption:
It only takes 10 Spotpower (SP) to haul a truck across the Boston Dynamics parking lot (~1 degree uphill, truck in neutral). These Spot robots are coming off the production line now and will be available for a range of applications soon. For more information visit us at www.BostonDynamics.com/Spot.