There's a bit of unfair comparison in that vid. Early on, it says foiling isn't easy and shows a bunch of Moths crashing. It then shows a UFO foiling nicely.
But the vid of Moths crashing seems to have been at the Sorrento worlds, where howling winds had about 35 miles of open water to build up waves which then met shoals and currents. The UFO vid shows someone sailing in perfect conditions; the sort of stuff any decent sailor can foil on any decent foiler.
OK, it's a promotional video, but the comparison still isn't fair.