You know this, how?
I don't think the video refutes Bergman on his plan to use the can at Don Carlos, but the video apparently doesn't show him heading for Don Carlos.
The relevant part of Bergman's written statement:
When I arrived at Twin Peaks, I parked my bike and when I saw how crowded Twin Peaks was I decided to use the restroom at the Don Carlos restaurant. Just as I started toward Don Carlos I heard shooting and ducked behind some cars. ...
mac_truck's remark, "He [Bergman] was clearly lying when he said he was on his way to Don Carlos when the shooting broke out." should be read in light of what Bergman actually said.
I provided police evidence photographs in post 5 showing Bergman hiding behind a motorcycle just a few feet away from where one of the Bandidos was gunned down.
Don Carlos is in the opposite direction from where Bergman is shown hiding.