Hi Cassidy, if you have feedback on a particular video, it is better to leave it under Tips and thanks on the video page.  Instead of asking a question, you press Tips and thanks under the video, and leave your feedback.

Whenever leaving feedback it's always a good thing to be specific about what you are frustrated (or happy) with. Having watched the video I have a feeling it could be about the "let's say we know the partial sum is.." at around 3:00 and onwards. There is also a top question under the video saying "Around 3:12, how did Sal get that equation? Is it from the sum of 1 + 1/4 + 1/9, or something else?"

The answer under that question by Z. Bateman is a good answer (I just voted it up). I hope you find the video more clear after reading the explanation!

(volunteer Star guide)