About cinematic timing in SMG

[Adamjensen2030]

https://www.youtube.com/watch?v=mKhXW83AI5I skip to 1:33 watch to 2:40

It took 67 seconds for the Supermassive blackhole(created by the Grand Star) to reset the universe in which the Lumas had to sacrificed themselves as Rosalina protected Mario, Luigi, Peach, etc except for Bowser.

How do you admins calculate how long the supermassive blackhole took to reset the universe if it's not 67 seconds?

Thanks for reading.