The video, created by The Sidemen, shows KSI walking through Portman Road car park towards a Royal Mail van to “see what’s going down”.
Six police officers were seen in gloves, handling items from the scene as a police car sat in the background, as KSI said: “It’s crazy out here”.
It is believed the arrest caught on camera was that of Rigers Myqelefi, aged 27 and of Harland Street, who was jailed on Friday for 38 months for multiple drug offences.
After evading officers on an electric bicycle, Myqelefi was found in the chassis of a Royal Mail van and arrested.
READ MORE: KSI and Sidemen stars spotted at Ipswich Waterfront
The Sidemen video has now had 5.3 million views on YouTube and close to 4,500 comments, and police have since released the bodycam footage.