Some guy named Dwayne posted some old footage of himself from UFC 4. Apparently, he had a job cleaning blood off the mats.

This first video is from a German news team's coverage of the event.

YouTube- Proof Dwayne was at UFC4

These next two videos are from the press conference before the fights:

YouTube- More proof that Dwayne was at UFC4

YouTube- Final proof of Dwayne's presence at UFC4