[Masamune]

I'm looking for an application that instead of just taking still shots of the screen, can actually record what's going on (i.e. a video capture of what's going on-screen). Can anyone suggest anything?

[rickey939]

Snapz Pro X from Ambrosia is what you are looking for....

http://www.ambrosiasw.com/utilities/snapzprox/

[Nai no Kami]

As for recording a video capture of your screen, do what our friend Rickey says.

Nevertheless, be aware that:
Command + 3 will take a shot of the screen, Command + Control + 3 will copy the shot to the clipboard.

Command + 4 will let you grab a portion of the screen; adding the Control key will have the same effect as above.

Finally, Command + 4 and spacebar hit will turn the crosshair cursor into a camera which lets you grab screenshots of specific windows or even dashboard widgets.