When you have a reliable internet connection, you don't think about how you watch YouTube on your iPhone. It just works. But there are plenty of times when you either need to go offline, or give your data plan a break. For these situations, it's pretty easy to download YouTube videos on your iPhone to watch them offline or without using data—but not all the methods are exactly equal.
That said, the company won’t do a thing about it if you do download videos from third-party solutions. Where it will take action is if you upload those videos, especially copyrighted videos, back online. So, play it safe: Download these videos only for your own personal use.
How to download videos using YouTube Premium
The first time you tap "Download," YouTube will offer you quality options for your download: Low (144p), Medium (360p), High (720p), or Full HD (1080p). If you choose "Remember my settings," YouTube won't ask you next time, and will default to whichever quality setting you choose here. Unless storage isn't a concern, I'd suggest letting YouTube ask you each time, since you'll see the total download size of each quality choice with this menu.
You'll find your videos under your profile tab on the bottom right, in the Downloads section. You can watch your videos from here, as well as delete any you no longer want saved to your iPhone. Your downloads will stay put so long as your iPhone connects to the internet at least once every 30 days. That's a bit annoying, but unless you're backpacking off the grid for over a month, you should be alright.
Credit: Jake PetersonMobile browsing on iPhone has come a long way. In many respects, it’s just as capable as browsing on a Mac or PC. For example, you can actually use a YouTube downloader in Safari and download a YouTube video just as you would on desktop.
About Shortcuts
In the past, my go-to has typically been Apple's Shortcuts, a treasure trove of powerful programs—some of which happened to be YouTube downloaders.
Previous versions of this article recommended JAYD (Just Another YouTube Downloader), as well as Sur. Unfortunately, both seem to have met the same fate as other YouTube downloaders, so I can't recommend them anymore. Most other YouTube downloader shortcuts I can find are also old and abandoned.
At this point in time, you really have two options for downloading YouTube videos on your iPhone: paying YouTube for the privilege, or using a free downloader site.
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