This is not Antarctica, Greenland, or anywhere near the poles. The ocean developed a layer of ice on top in Massachusetts! This video was taken at Old Silver Beach in North Falmouth this past weekend. Don't be nervous watching Ryan walking out on it. He explained at reddit:
I haven’t seen any boats yet, I hope people got them out of the water in time. I took this video at low tide so the ice closest to shore was hollow underneath it, you had to walk out 10 - 15 feet to be over water.
Then he sent his drone out to get more footage.