Another alternative to the 973 video is the 610 Design files. I really like how it lays out gearbox cadding, and it's how we introduce basic gearbox design.
You can find it here,
http://team610.com/wp-content/resour...orialsRev7.pdf
There's a parts library too, if you're interested in that. Search for it.
It also covers fastener types and linear motion.
Good luck!