I personally was completely lost with the explanation in the video for Binomial Distribution. I found this video on youtube that explained it much clearer to me:

I think it makes much more sense to first explain the binomial coefficient and then the distribution than vice versa, and the video for binomial coefficient was also much more confusing to me.

Given that this YT video I shared does not include all the info of the course’s video on Binomial distribution I do recommend to rewatch the course’s video after watching the YT video.