According to NOLA.com, the Miami Beach brawl in this video depicts New Orleans Saints linebacker Junior Galette fighting multiple people, and smacking one woman with a belt.
The video was uploaded on March 25, 2013, but apparently no one noticed until recently. The Saints were made aware of the video, and said they sent it to the NFL. Here are a couple of screencaps of the man in the video:
Galette’s attorney denied that the man in the video was his client:
Update [8:11 p.m.]: Here’s a screencap of a photo Galette posted on his Instagram page the day before the video was posted online. You can see that the man alleged to be Galette in the video is wearing the same sunglasses in the photo.