We often use the technique of narrating over screenshots and saving work as a video. This is often done using iPads. As we use iMovie for filming it makes sense to use iMovie for this technique as well. My other favoured option for iPads is Shadow Puppet Edu. This is a free app which is very simple to use. So simple it makes it easy to use in key stage one.
If your schools only has Windows laptops you can use PowerPoint to record videos with narration. The short guide below shows you how to do it.