Almost forgot about this video from more than 10years ago. I remember, we filmed some sketchy (for my skill level) downhill riding, which didn’t make it into the video, because the guy who made the video ended up wanting something more chill. 
I don’t think I ever remotely considered combining unicycling and paragliding. But I knew this film-maker who told me, that he had this idea for years already. When he found out, that I had a unicycle, I had to to it.
That’s sooo cool! Particularly the fact, that you even managed to (literally) land it so smooth. 
Just make sure that the seatpost clamp is properly tightened 
EDIT: oh wait, the landing probably wasn’t so smooth after all. I think you cheated a bit in the video.
Haha, well spotted:
I think we did two landing attempts:
On the first one I failed, and on the second one the camera-man failed.
But with some head-wind and a flat surface the landing isn’t tricky at all.
How did you fix the unicycle to your body?
I was wearing an old climbing chest harness and I attached the uni-saddle with some rubber chords to that harness so that the saddle barely touched my butt while flying.