Ghosts of the past Starcraft 2 trailer

This is a trailer from an unlockable reward throught Blizzard's site

Evolution of Protoss units

In this video you can see how things changed in starcraft ii

Starcraft II 40 kills

Starcraft 2: 1 Nuke 40 Kills by Drift0r (Gameplay/Commentary)

Starcraft II live gameplay

Starcraft 2: Live Commentary and Playthrough - Mission 2 by Tejb (Starcraft 2 Gameplay)

Starcraft Fastest Map Rush Counter (3on1)

This video shows how to stop a 3 player rush in the early game.

StarCraft 2 Beta Crazy Zergling Rush (almost 400 Zerglings Massive Attack)

Benchmark type replay that has an insane amount of zerglings on screen at once.