This video is intended to guide you through installing ADB and the Android SDK onto your computer. Why do you want ADB? Because there will be times when it is necessary to send files or commands to your Android devices, and ADB is a great avenue to do so. I recommend having this installed on your computer if you are doing any sort of modification to your Android device.
If you are struggling this process, or have questions, go to the REVTV Forums to get help!