It's called jumpstyle. I found this video which is pretty good (at 1:20) https://youtu.be/aja2Wlp9OD0

The other dances are also very well executed. I think jumpstyle worked so well as a fad dance is because it's easy to learn, variation is pretty basic, you can somewhat blend in if you can keep a rhythm. Whereas tectonik is fucking awesome but you look like an idiot unless you're crazy good and wayyy confident.

So, heres the very basic version; you start with your feet apart at the distance of your hips approximately, you jump

1. up and down
2. up and down
3. right foot forward left back
4. Left foot forward right back
5. Right food forward and lifted, left back (see note)
6. Left food forward and lifted, right back
7. Like 5
8. Slightly rotate to the left, foot still up
9. Like 5
10. Like 6

Note: That's what I remember you do with a partner who does the same facing you. From step 5 onwards your right feet (in 6 the left feet) touch