Yes, the macProVideo tutorial is done by Peter Schwartz, one of the Logic specialists who knows the Score Editor inside-out. I can highly recommend it.
If you need a written manual with more in-depth explanations, then I can recommend my own manual Logic Pro X - The Details (available as pdf, printed book, or interactive multi-touch iBook). One of the reasons for the often frustrating experience when using the Score Editor is the "special" concept that Logic uses with many parameters influencing the way your score looks. With lots of diagrams and illustrations I explain on 90 pages in the "Music Notation" chapter how that works and how you use every single element in the Score Editor.
Here are two examples that demonstrates the underlying complexity of the Score Editor
The Notes
The way a note appears on a staff is determined by many different parameters ("forces"). In order to determine a specific look of a note. You have to know what those parameters are that can mess with that.
The Layout
Creating a specific layout on your score can be extremely frustrating in Logic. Again, you have to be aware of all the parameters that you have to take into account. Her is a diagram from the book that shows what elements influence that look.
Hope that helps
Edgar Rothermich - LogicProGEM.com
(Author of the "Graphically Enhanced Manuals")
http://DingDingMusic.com/Manuals/
'I may receive some form of compensation, financial or otherwise, from my recommendation or link.'