recording videos on my screen

http://www.google.com

screen capture

There is GameCam though : http://www.planetgamecam.com

If you want to record your screen while in Windows, like you want to make a video tutorial on using a program, I suggest you use : TechSmith Camtasia - http://www.techsmith.com

theres a program out there that tells you the fps of games and also can do image capture, forgot the name

FRAPS is the name, easily found on google, and its pretty inexpensive if you plan on using it.

i use camtasia. records audio too..