Fuck me, they even cheat at this?!
They're using live action morphing software. You take two sequences and the software produces the second end frame from the first start frame.
It works best when the start and end positions are quite similar, so they do a 'take' with the introductory banter, and then keep trying until they have a 'hit' on one of the tests, and the continue the banter from there. There are some tutorials on the web that tell you how to make viral videos in this way.
With the pro versions of CGI systems it would take an expert to tell the difference, and soon no one will be able to distinguish live action from morphed action, even when made with ordinary desktop software.
This is all done with video editing technology. I have seen some of the software used to achieve this sort of thing and it's amazing. As long as cameras are positioned in the same place you can splice split-second frames together that will look like 100% perfect video.
So those videos are made from potentialy hours of footage.
Nah, that's the old way. I have had a play with EIAS3D and all you have to do is shoot two scenes from the same position: one with the start action you want (Weepu passing) and one with the end action (the ball knocks off a target ball). Then you divide the visual frame into thee zones: a start zone (where the start action persists), an end zone (where the end action persists) and a tweening zone (where the movement of the ball is morphed). Then you press go and the software does the rest. Provided there is only one object in motion then that is all it takes for a highly realistic result.