You’re traveling to a place with no Internet, it’s going to be difficult to get your daily YouTube fix. That’s just one of the many reasons why you might want to download YouTube videos. Once you download videos you can watch them at leisure without having to worry about your Internet connection.
Open the YouTube app on your smartphone. Open any video on the app. Below the title, you will see a Download button between Share and Add to. This will show up only if the creator of the video allows downloads. Once you tap Download, the video will begin downloading and you can watch it from the app whenever you want to.