Jack Doherty was more worried about his bling than he was about heading down to the local jail ... begging cops to let him give his watch to a friend while they were slapping cuffs on him.

We've obtained footage from Jack's Saturday morning arrest ... and, it kicks off with Doherty stopping next to a police car and getting searched in the middle of the street. Turner Guilford Knight Correctional Center

His friends are filming the interaction ... but, they're quickly moved aside by cops who tell them they can step onto the curb or step into a pair of handcuffs just like Doherty. Unsurprisingly, they all choose the sidewalk.

Doherty's put in a pair of handcuffs and searched ... with cops pulling multiple items -- including what appears to be a pill -- out of his pocket. Miami Beac

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