While a video can be helpful, it is really unfortunate that people don't put the effort into taking screen shots and providing text descriptions so that it is convenient for the person looking for a guide to follow along at their own pace while playing OR using spoiler tags in the text would allow for increasing degrees of hints/suggestions/tips.

Good on the author wanted ad revenue from the video as there at no less than 5 mid roll ads in this video.

For any lost souls like me, the simon says game is done by looking at the number order.

Example :
red 245
blue 13

That means press the first one is blue, the red cause of the number 2, then blue cause 3, and then twice red cause 4, 5. Hope that helps :)