Ever since Youtube boomed on the internet, the one thing that everyone has wanted, at least once in their lives, is a way to download and save Youtube content on their device. Since there was no official way to do it, third party developers cashed in, and that gave rise to many not so legal websites, that allowed you to download Youtube videos and save them on your system as MP4 files.
When Youtube saw this trend going up, they immediately brought the hammer down, and while they openly declared that downloading videos unofficially was going against their terms of service, they followed it up with the launch of the Youtube Premium service for iOS and Android.
If you subscribe to the Youtube Premium membership, you can now download videos from Youtube and keep them saved for offline viewing. However, keep in mind that these videos will only show up in the app.
