From the LiveLeak video description

Drunken man attempts to start a fight with a robot and receives a right hook from Titan.

Titan the robot is the stage name of a costume created by Cyberstein Robots Ltd. The robot is approximately 2.4 m (7.9 ft) tall and 60 kg (9.4 st) and increases to 350 kg (55 st) including the cart it rides on and onboard equipment. It was designed by Nik Fielding, who runs Cyberstein from Newquay, Cornwall, England.

Action starts about 1:00