If you record plenty of video you can edit it before sharing or even trim just to save some space on your iPad.
To do so, open the Photos app, select Albums, then open the Videos album. Tap on the thumbnail you wish to edit. As it fills the whole screen you’ll see the familiar play button in the middle, alongside the scrubbing bar across the top of the screen.
On either end there are black markers with arrows – dragging these will trim the video. Tap and hold one and move it towards the middle of the scrubbing bar. Once the section has been isolated, tap Trim in the top toolbar. You’ll then be given the option to Save as New Clip. This will make a copy of the video, allowing you to keep the original clip if you’re not ready to delete it yet.