Add Sound and Special Effects
The next step is to dub in audio or sound tracks for your video. No app video is complete without background music. A video that has no sound or only records someone talking about an app will come across as amateur and unpolished in most cases. iMovie allows you to dub in a voiceover if needed for your app. Some apps, such as the Any To Do app I discussed earlier, don't use a voiceover but instead rely on a catchy song that's appropriate for the app type.