Is it possible to download or save a YouTube Playlist so that is can be viewed while offline?
1 Answer
YouTube's premium service, YouTube Red, allows this in the YouTube, YouTube Music, and YouTube Gaming apps.
Once you are subscribed to YouTube Red ($1.99/month), you will see an "Add to offline" button below videos, this will allow you to download the video at your selected quality so that it can be viewed offline.
Source: Using YouTube Red benefits