Yeah nah, it's not really doing what they say it is doing. It's 'simulating' capturing a trillion frames per second.
In old school terms what they are doing is replaying the same event over and over, and taking snapshots at certain points in time. For example, it's like they got a sprinter to run 100y a 100 times - on the first run they take a picture at +1 sec. On the second run they take a picture at +2 second, and so on - and they stitch all the photos together to make a video.
The results are still cool though, and would require something that can step timing in trillionths of a second.