According to Captain Chad of SeaSalt Charters LLC. (located in Provincetown, Massachusetts), this is one of the "best whale watching videos he's recorded in decades!" It features a group of massive humpback whales feeding with their mouths open right next his private whale watch boat off the coast of Cape Cod. The vessel did not intentionally approach the whales, and the crew appropriately waited until they left the area before reengaging their propellers.