Strategy Vids
 

Found these very useful and impressive strat videos on Youtube all from a user that goes by the name of ForceSC2strategy. He goes through all sorts of different builds and tactics with all three races Zerg, Protoss & Terran. He is constantly adding new videos daily and he does narrate them very well.

He has 84 videos in total, I strongly suggest checking them out.

ForceSC2strategy's Channel

Nice find, man. I've been watching strats but none of them are as well explained as those. Definitely going to be getting some tips from there.

Here's another site:

http://www.starcraft2strategymasters.com

They don't explain as much but they're still useful to watch.

The best website to go to if you're looking to improve your game is hands down is team liquid. All the top pro's are on their forums daily discussing strategy, new build orders, balance issues, counters etc.

http://www.teamliquid.net/

They also have a wiki page dedicated to starcraft.

http://wiki.teamliquid.net/starcraft2/Main_Page

Pretty good but I like Force's. He only does videos so you can really see what's going on. He also explains WHY the player is doing what they're doing. Even goes solely into the vision of the player who's strategy he's discussing so you really see what that specific player is thinking and how they are reacting to certain situations, pressure, etc.

On another note I already picked up a few tips from the site you posted so I'll definitely be checking back there :)