Where can I find an underwater video of a narwhal?

Narwhal is a whale with a tusk. I’ve seen plenty of pictures of it, found the surface video on National Geographic website, etc, but no matter how hard I search, I can’t find an underwater video. They never show narwhals in Planet Earth. I haven’t seen all of the Blue Planet, but from what I’ve read, they don’t show them there, either. Were there underwater videos ever made of narwhals? Maybe some National Geographic film has it?