Things You Need:
a valid internet connection
Step 1: Quick Time Player
Open Launchpad. Click on other. Click QuickTimePlayer
Step 2: File Menu
Go to the file menu. click on new screen recording.
Step 3: Options,Options,Options: What to Choose
Now, you need good audio. DO NOT USE A INTERNAL MICROPHONE. I MUST REPEAT DO NOT USE A INTERNAL MICROPHONE. Instead use the one that comes with a iPhone or buy a external microphone.