Usually, when someone sees a shark, people run away from the water.
The men in the video saw the creature and realized that it was tangled in fishing line.
After pulling it onto the sand, they untangled it and removed the hook from its mouth.
The critter they saved has been identified as a blacktip shark. That species stays in shallow water to nurse its pups. However, the nursing season is in the spring and summer.
Fishing for blacktips is legal in Florida.