[inevaexisted]

what tool would they use to steady the camera frame like that? having little experience with video editing the only way I know of doing it would be getting opencv to track the horizontal line on the back(of the jumper) of the guy who was leading and rotate the frame accordingly, surely there are video apps that do this simply.

[Samuel_Michon]

Nowadays, even cheap non-linear editors have a built-in motion stabilizer.

Apple iMovie: http://www.youtube.com/watch?v=W7b2SOrwT20

Adobe Premiere Elements: http://www.youtube.com/watch?v=vqM1mbSsTlQ

[hammock]

It's built into youtube when you upload videos - and it's very good. Easiest way to tell how much it's stabilizing is to notice the way the frame (black rectangle outline) bounces around during the video. A more trained eye will also notice the subtler IS distortions.

[ohwp]

Your head is a remarkable steady tool. Check out some off road bike movies made with helmet cams: http://www.youtube.com/watch?v=VC9f7Ab6_Ss

[ricardobeat]

They probably used Deshaker or similar software, but you can even do that in the youtube editor now.