Detectives investigating the incident hope to learn the identity of the suspect, after police were called to a report of an assault in the early hours of Saturday September 19th at the Custom House Hotel on Victoria Dock Road, Newham.
The man can be seen in the footage having an argument with the victim, before taking his neck in his left arm and hitting him in the face.
After the man lets go, the victim falls onto the hotel counter and then the floor.
The London Ambulance Service treated a 37-year-old man for a cut mouth and bruised eye at the scene, before he was taken to an East London hospital.
Police describe the suspect as a white man wearing black shorts, black ankle boots, white/grey trainers, a baseball cap and a black top with a logo on the rear stating “No91 Criminal Damage London”.
Police are keen to hear from anyone who recognises the man caught on CCTV.