Why do some cakes run for different durations in videos?

[upNdown]

I'm looking at psycho fury specifically, but I've seen it with other cakes in different videos. Why?
In the following videos, Psycho Fury runs for 10 seconds, 30 seconds, and over a minute, respectively:

https://youtu.be/yVf-jI7jA_Y?t=22s

https://youtu.be/W_MHeIOP_QU?t=6s

https://youtu.be/h-YRmwaxiPk?t=4s

[Bazerk]

These videos were posted with years between them. The first being from 2012, the second from 2014 and the last one is from 2017. I would personally use the latest one as a go by. I would image that they realized the original version was too fast and looked like sky puke and thus altered the timing to be that more like the last two videos.

[shake the cove]

Hard to get the timing down even when the wholesaler lists it. Best if seen at their demo to be closest accuracy. Great in a body of the show to fill sky and of course the closer distances allowed for cakes. Never use cakes near the end of finale. I have seen too many go way slow and still firing after the finale ended.

[djsmurf]

Some cakes will be faster or slower depending on a number of things. This one like Bazerk said looks like they slowed it down for a better effect. The first video of it, it looked terrible lol.