Detectives investigating a fight at the Sutton Arms pub on Station Lane in Hornchurch are appealing for witnesses to come forward.
Police were called at 11.10pm Friday, July 24 following reports of an altercation inside the pub.
One man sustained a minor head injury and was treated at the scene.
Detective Constable Daniel Smith, who is leading the investigation, said: “Mobile phone footage of this incident has been widely shared online. What this footage shows is a significant number of people witnessed this altercation and we really need to speak to them to find out exactly what they saw.
“It is really important that we find out what you know as it could be significant to our investigation.”
There have been no arrests.
If you have any information that could help police investigate please call 101 and quote CAD44036/24July. To remain anonymous call the independent charity Crimestoppers on 0800 555 111 or visit crimestoppers_uk.org