Two screencasts, about 80 and 40 minutes long are available at:
Courtesy by fellow Ottawan Bert Trojanowski. Really nice job of providing deep enough technical understanding with good illustrative examples.
If you want to get into distributed version control (which is IMHO way to go), check this out.
Before I forget 🙂
1) The Git Magic
2) Two git books Pragmatic Git Book and Git internals – nice complement each other
3) Linus Torvalds slightly offensive and very funny talk at Google
in addition to great, precise but not necessarily most digestable manual …