YouTube Red users have had the option to listen to music offline in YouTube Music for some time, but only through the offline mixtape feature, which is automatically populated based on your listening history. While this technically worked, there was no way to have any additional control over what you were able to listen to. Now, users can also choose specific songs, playlists, and albums to save for offline listening.
To save music for offline listening, tap on the Menu icon (marked by three dots), next to any song, playlist, or album, and select Save Offline. A pop-up will then appear, asking if you want to save just the audio, SD video, or HD video (when applicable). On iOS devices, you can also swipe left on a song in a playlist, and then select Offline. Then, to access your offline music, tap your profile photo and select Offline.
PSA: though offline mixtape was probably suitable for most, YouTube Red subscribers can now have complete control over what they can listen to offline in YouTube Music. So stock up those playlists for the next long-haul road trip you have planned — do it before you’re out of good Wi-Fi range.