1) Go to ScreenCast-O-Matic
2) Click Start Recording
3) When asked to run Java Applet, Click Run this Time or Install the java plugin.after java is been installed refresh the page.
4) You’ll now see a new frame that you can resize and drag to the region you want to record
5) You can also customize settings by changing the resolution and other changes.
6) After setting up the frame and the correct settings, click the Red Rounded button to start recording.
Done! After finishing the record a new window appears containing the video to save