Those aren't rubber mats first of all, if you know about stunting you should know that a trick he pulls off many times in that video is called a "death spin" which requires you to build up momentum in a circle wheelie, pull in the clutch and have the bike pivot on the rear tire in one spot 360 degrees ...That would not work well on a rubber mat as there would be too much traction....Generally people use sheets of plywood for these type of videos, sometimes sprayed with something that has a little traction, but not rubber mats...
Regardless off the surface that stuff its really hard to do in a small perimeter like that, the sheets are there to make it possible not easier...You can circle on grass, dirt, etc, but it would be really hard to clutch the bike up, especially in such a small area. And you would not be able to ride with such a on the gas style on those surfaces...Also I dont think your going to get the bike to float on the surface of water for the water shots...Jorian is one of the best stunt riders in the world, this is just a different style of video...He can do it all, watch his other videos and you will see