If it is just a trick of the camera could someone explain the shadow that is cast at the 1 minute point.
The water is genuinely in the position you can see in the video 24 times a second for a fraction of a second (as is the shadow). What the camera doesn't show is all the all the intervening water positions, that, to the naked eye, would just look like a blur of falling droplets. it just so happens that the water falls through the same shape again and again every 24th of a second.
The difference between the camera 24Hz and the water frequency gives the apparent forward/backward drift in time. It's quite fascinating to watch
Strobes are used to observe fast rotating machinery, with the strobe firing at the same (or very near) speed as the rotating part, which makes it appear stationary even though it is moving fast - as the same position is illuminated every time the strobe goes off. It's the same principle with video capture.
