How do I achieve a logo bordering the nav menu & why is there so much white space?

This screenshot says it all:

How to Place Logo on Secondary Nav Menu and Reduce Surrounding White Space

Could you kindly provide me a screencast, as your text tutorials often leave me confused, as I am more of a visual learner than a reader? If you can't, I perfectly understand but please provide the steps in greater detail. Thank you very much.

Sincerely,
Caleb