I don't think thats a Swingbike. Swingbike's typically don't have direct drive, unicycle like drivetrains on them. Clearly a variation of... I'm just saying that I've never seen a bike like that in the Swingbike info. Even though referred to there as such, that looks more like a circus bike thing than a swingbike.

FYI: I've got a commercially made Swingbike from the 90's, the "original" ones called "Swingbikes" were made in the 70's. There have been various smaller manufacturers marketing the gimmick since then. They're lots of fun, highly reccomended.