katt williams *TMZ got a hold of video of Katt Williams being busted up in Oakland late Wednesday night/early Thursday morning.

Williams was arrested outside Kimball’s Carnival in East Oakland around 3AM after allegedly hitting someone in the head with a bottle at a nearby hotel. He was released yesterday afternoon.

He was so furious that he threatened to cancel his show in O-Town today over the experience

In the video, Katt says “Call Live Nation … call the radio station … the show’s canceled.”

Katt was referring to his show tonight at Oakland’s Oracle Arena — but he was bluffing … because we called the venue to see if it’s still on … and they said yes.

Katt also seems to claim he was outnumbered during the alleged hotel fight — saying, “Four dudes … one of me” — but the audio isn’t clear.

Check out the video: