This video is called Incredible Footage of Killer Whales Playing Underwater.
Scientists enlist the public’s help in identifying pilot and killer whale songs: here.
Translated from Dutch NOS TV:
Off the coast of Stellendam [a Dutch lifeboat] has succeeded in pushing a stranded sperm whale back into the sea. The animal of more than 12 meters long was swimming towards the shore this morning, and had beached on a sandbank.
Pilot whales strand again on New Zealand beach: here.