This is a historical, colorized footage from March 9, 1945. Several B-29 bombers left their basis in Guam and on the islands of Tinian, Saipan to bomb Japan. Sometimes when the bomber got damaged or suffered mechanical malfunctions and couldn’t make it back to the base, the crew would put it down at sea – a procedure known as ditching – and wait for rescue.
B-29 in this video ran out of fuel and would have been unable to make it back to Tinian Island so the captain radioed a call for help and ditched the craft. They were picked up by USS Bering Strait that had a cameraman on board who filmed the ditching and the rescue. Whole 12 minute of raw footage the cameraman recorded is in the video below: