Elon Musk responded to a video showing a Tesla Model Y labeled 'Robotaxi' driving on the road.The video surfaced after Tesla was named as an AV operator in Austin during the testing phase.Musk praised the design of the vehicle in the video and hinted at the imminent launch of Tesla's robotaxi service.Tesla is expected to start with a small rollout of its robotaxi service, with plans to expand to more cities in the future.