From Vsauce.

Thanks, mom ❤️
This is a video I shared elsewhere a couple years ago before YouTube shorts could be more than a minute long. Today, they can’t be more than 3 minutes, but with a few ‘fast forwards’ I was able to get it just under the limit and finally share it here!

The "13 Trick" is a self-working mathematical card trick where aces = 1, jacks = 11, queens = 12, and kings = 13.