Katt Williams Arrest Footage -- Comic Threatens to Cancel Show

Katt Williams was FURIOUS when Oakland police arrested him Thursday morning ... so furious he threatened to cancel his show in O-Town today over the experience -- and TMZ has the arrest footage.

TMZ broke the story ... Katt was busted 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.

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.