How to align an youtube iframe and a blockquote underneath it?

Hello, I did the portfolio challenge and I want to do a minor tweak on it but I have been stuck for a good hour without success.

On the second section of my page there is an youtube iframe with a blockquote underneath. I want to align the blockquote to be centered with the video, I have tried a lot of stuff and nothing works. Any of you know how to do it?

this is the portfolio challenge