Tap and hold the folder-shaped icon in the bottom-left corner of the screen, then swipe it to the right side of the screen. You should see a list of folders appear. If your iPad isn't running at least iOS 11, you don't have the Files app. If this is the case, you can't move the video into your iPad's Camera Roll; however, you can still view the video from within the Documents app. This folder is in the middle of the Documents page. Tapping it opens a list of your downloaded files, one of which should be the video. Look for the title and thumbnail of the video that you just downloaded. It's in the bottom-right corner of your video's thumbnail icon. Doing so will open the video's options menu. You'll find this green icon in the middle of the options menu. Tapping it opens a pop-up window at the bottom of your iPad's screen. It's a folder-shaped option at the bottom of the screen.  You may have to scroll right to see this option. If you aren't using iOS 11, you won't have this option. If so, you can't move the video out of the Documents app. Tap the On My iPad file location, then tap a folder and tap Add in the upper-right corner of the screen.
Documents व्यू को खोलें: Downloads अपने विडियो को खोजें: ⋯ Share Save to Files विडियो को अपनी Files एप पर ले जाएँ: