In the past we’ve sometimes found that videos are filed by the date when they were posted to YouTube rather than when they were downloaded, but that appears to have stopped in more recent versions of the app. Once the downloading finishes, your video will appear in the Download folder within the Documents menu option of the app. Click on the Save button (or Done on the Keyboard), and the download process will start. You can go to Albums, scroll down to Media Types and hit Videos to make it easier to find. Tap on the Download button and name the video according to your likings. Open the Photos app and you’ll see your downloaded video. If you need to change these permissions in future, open the Settings app and tap Privacy > Photos, then tap the entry for Documents and select Read and Write.)
(Depending on your settings and whether you’ve done this before, you may be asked to give Documents permission to access Photos agree to this. Tap and hold the video, and drag it on to the Documents label, and then on to Photo Albums, and finally All Photos or another album of your choice. We’re going to move the video into the Photos app, and this can be done easily by just dragging and dropping. From this section, tap Downloads, and you’ll see downloaded videos complete with thumbnails and more information. Find the video you want and tap the three dots icon on. To open this you may need to tap the three-line ‘hamburger’ icon at the top left to open the side bar, then hit Documents. To save your downloaded videos to your iPhone or iPad hard drive, go back to the Documents app home screen and open your Downloads folder. YouTube offers a subscription service called YouTube Premium, which allows you to save videos on the YouTube app on your iPhone, giving you the option to view them multiple times without needing to stream them. Documents has a section called, well, Documents. Downloading a YouTube video can help you save the data that would be used on viewing it over and over again.