It turns out that there's a whole genre of products like this with a Wikipedia page for Human Powered Hydrofoils . I'm quite impressed how slowly you need to travel to stay above the water.
If you want to make one there's instructions on Instructables to build your own.
What's in the video is a commercial product, the Aquaskipper. It's homepage seems to be at inventist.com where they list several similar and some very different cool toys. I'm guessing they're a good aggregator/marketing company but I could be wrong. I'm impressed you seem to be able to pick one up on Amazon directly. If you search youtube there's a lot more videos of people playing with them.
Their official promo video is here:
