A Really Good Plugin/Widget but misses "centering"

I really like this, compare to all the other YouTube plugins, this is the one that’s most relevant in my case. I would give it a 5 star if it came with a feature for centering it on the widget space. Mine is a little bit to the side. Which looks UN-proffesional to me but if someone has a alternative way to code it so it works, please share the method!