QuickTime Screen + Audio Capture I'm using Retina Macbook Pro running OS X 10.8 Mountain Lion. Is it possible to use QuickTime to capture both audio and screen ? If not, what are the free apps that can do it?

P.S. A lot of the times I see on Youtube that it possible to capture screen + audio + have a little window of yourself in the corner - how is that achived?
This is how I did it. You may need a pair of headphones if you use the bult-in microphone.

Open quicktime and click File->New Screen Recording 
Select the audio source by clicking on the small down-pointing arrow 
Turn up the sound that appears below the record button 
Click File->New Movie Recoring 
Resize the movie window and place it where you like it 
Click record on the screen recorder window