It lets you download all of the videos in a particular playlist so that you can watch them offline or share them with others. YouTube playlist downloader is a great tool to have if you want to save your favorite videos for later. why you need YouTube playlist downloader.? You can then use this file to watch the videos offline or share it with others. This program allows you to download all the videos in a given playlist in different format. One popular type is a Youtube Multi downloader. YouTube playlist downloader is a best online tool for downloading videos from YouTube easily and quickly. There are many different types of downloaders for YouTube.