Here's a series of videos from YouTube on calvinism that are very useful.
The first is a response to a YT user "potatofarts" and gives a greatpresentation of calvinism in less than 10 minutes.
The user's link is here-
http://www.youtube.com/Oct31st1517
This video series is from administrator/writer Lane @ this site-
lanechaplin.blogspot.com
And his You Tube channel is here-
http://www.youtube.com/LaneCh
Here's a video I did