If you ever felt boggled trying to figure out what Roman Catholicism is all about, don't worry, you're not alone. It's very complex and has a long history full of changing faces. It is a worthwhile endeavor to better understand it, but if you are pinched on time then here is an exceptionally good 2-minute video clip that could be helpful to capture the heart of the matter. The clip comes from the documentary called The American Gospel - Christ Alone.
Enjoy and God bless you!