The video is about the full uninstall of programs on a Mac computer using a program called AppZapper. The video begins with explanation on how files deleted from a system often leaves behind traces of files which slows down the system and leaves the hard drive fragmented. To avoid this a program called AppZapper can be used to uninstall the applications. This program is available as a trial version which will zap 5 applications and a full version with three updates for 13 dollars. So when you uninstall an application using this program it will delete all the associated files along with the application which would otherwise take up unnecessary space on the hard disk.