Jameis Winston -- VIDEO OF CRAB LEG THEFT RELEASED

Here it is ... surveillance footage showing Jameis Winston STEALING CRAB LEGS ... and it shows, dude is the most casual shellfish bandit of all time.

The footage, shot April 29th, shows the Heisman Trophy winner nonchalantly walking up to the seafood counter at Publix grocery store in Tallahassee ... grabbing $32.17 worth of crab legs and crawfish ... and walking out of the store without paying for it.

Note -- you can see Winston follows a security guard out of the store .... and hung an immediate right the second he left the building in what seems like an obvious attempt at a clean getaway.

Winston later admitted to jacking the food -- and was ordered to serve several hours of community service ... which he completed at a local YMCA.