Katt Williams Proof in Video Pudding Katt Punched First

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Katt Williams can't use the "he jumped me first" excuse anymore ... because a new full and uncut video of the fight between him and a minor clearly shows the comedian struck first.

You can see Katt and the kid exchanging words while walking off a soccer field, and the jawing goes on until Katt's up against a wall. Seems pretty obvious the kid was egging on Katt, but it's also clear the comedian got physical.

Katt might still argue he felt threatened -- the kid was inches from his face -- and that's why he threw a punch.

Katt's got a lot on the line -- multiple ongoing court cases and the possibility of having his bail revoked. Police plan to meet with the D.A. Thursday to discuss the case, including the latest videos.