Thanks to the anonymous reader who submitted the following 2 videos.
They show the complete warm up routines of female Chinese weightlifter Cao Lei, who won gold at the 2008 Beijing Olympics. Definitely something to learn from.
Warm up for the Snatch:
Exercises: Pressing Snatch Balance, Drop Snatch, Overhead Squats, Tall Muscle Snatch
Warm up for the Clean and Jerk:
Exercises: Scarecrow Clean, Overhead Triceps Extensions, Tall Muscle Clean, Mid Hang Clean