MooMooMath, created by a high-school math teacher, is a channel with 600k subscribers and they have a website with plenty of great resources. This video however seems to have slipped past quality control.
If you know that 5184 factors into 72 and 72 then you're already done!
Edit: I don't want to come off as hating, I respect educational channels that teach and MooMooMath generally makes good videos, I just thought this was funny.
I've tutored middleschool and high-school math and the way I would teach this problem is to select obvious factors to start with, because 5184 is even 2 is an obvious factor, and we can use the digit sum method to tell if 9 is a factor, 5 + 1 + 8 + 4 is 18, 1 + 8 is 9, so 9 is a factor.