Screen recordings capture all the activity on your computer screen including any programs you are running (e.g., powerpoint, facetime, etc.), movies you are playing (e.g., a youtube video) and actions that you take (e.g., opening a program, typing, etc.).

It's easy to  create a screen recording using QuickTime.  To start, open QuickTime and then

(1) Click on "File" in the menu bar

(2) Click on "New Screen Recording"

(2) Click on the red "Record" button.

(3) Click on the "Stop" button to end recording.

Once you are done, you can easily edit your screen recording in iMovie.

Helpful Hints:

Your screen recording will automatically be saved in your "Movies" file. To change this location, click on the drop down menu in the recording dialogue box and click on "Choose" under "Save to" to pick a new location before recording.

Your screen recording will also record all audio including the sound of your typing and mouse clicks. If you don't want to record the sound, click on the drop down menu in the recording dialogue box and click on "None" under "Microphone" before recording.