Earlier quoted context omitted.
It kinda is, but as far as i know they're actually taking the multiple photos separately of different pulses and editing them into one video.
Is there another method of making a video?
The approach here would be to take a photo of a car, then drive the car past again from the start and take another photo slightly later, then again, and again driving it past hundreds of times.
They split this up even more, but I think the basic analogy holds to show the key difference.