A uniformed NYPD sergeant was caught on video unleashing a vulgar tirade against a group of Brooklyn men Sgt. Lesly Charles threatening them with his gun even while condoning their criminal behavior, The Post has learned. Sgt. Lesly Charles even indicated that some criminal activity is apparently OK on his beat as long as he’s paid proper respect. “You guys are hustling or whatever, I ain’t got no problem with that. Listen . . . do your thing,” Charles barked during the April 28 diatribe, which is now being investigated by the city’s Civilian Complaint Review Board. “But when I come around and I speak, you f–king listen. Tell your boys.” WORKING BLUE: Sgt. Lesly Charles spews a disgusting series of insults at a group of citizens in a cellphone video supplied to The Post. WORKING BLUE: Sgt. Lesly Charles spews a disgusting series of insults at a group of citizens in a cellphone video supplied to The Post. The surly sergeant apparently was angry over a car that was illegally parked on Ditmas Avenue in the Kensington section. His rant against the men was recorded on a 20-minute cellphone video obtained exclusively by The Post. The footage includes Charles berating a young man in the roadway near a silver BMW, telling him: “This is my street. All right? If you got to play tough, that’s your problem . . . I do whatever the f–k I want.” A short time later, Charles followed the group into the nearby No. 1 Chinese Food restaurant, flanked by two plainclothes cops. “I have <b>…</b>