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TMZ Sports has obtained footage showing Dallas Cowboys defensive captain Tyrone Crawford brawling INSIDE a Florida bar ... destroying several giant security guys.

The video shows Crawford -- 6'4", 280 lbs. -- fighting off a team of bouncers at the Coyote Ugly Saloon in Panama City Beach, Florida on March 15.

Unclear what started the brawl ... but it escalated VERY quickly -- with at least FOUR big bouncers desperately trying to subdue the NFL player, who is just too powerful to overcome.

Crawford is just wrecking everyone -- using brute strength and powerful punches to take down everyone in his way.

At one point, 4 bouncers -- in red shirts -- are ganging up on Crawford ... who frees himself and clocks one of the bigger security guards, sending the bouncer crashing down to the ground.

As we previously reported, the fight spilled outside and cops were called to the scene ... where Crawford continued to get physical with multiple police officers.

There is video that shows Crawford barreling through 2 cops and then shoving 2 other cops while they are trying to arrest a man allegedly involved in the bar fight.

Crawford was NOT arrested that night and has not been charged with a crime.

The NFL went to the bar on Tuesday in an effort to view surveillance footage and collect information on the incident. Unclear if the bar allowed the investigators to watch the video.

According to the police report, the bar also has surveillance from inside the Saloon ... but the responding cops noted there were several blind spots that missed key moments in the altercation.

The good news... our video, shot by a bar patron that night, could fill in the blanks.

The league has disciplined players in the past for violating the league's Personal Conduct Policy despite not being arrested, charged or convicted of a crime ... which means Crawford could be punished if the NFL finds his actions violated the PCP.

We've reached out to Crawford and the Dallas Cowboys but they haven't commented on the situation.

We also reached out to the NFL regarding their investigation but they aren't commenting either.