Assuming you would like a content section discussing which app can be used to join two videos: There are a few different apps that can be used to join two videos, depending on what system you are using. For iPhone users, iMovie is a popular option. This app is free to download from the App Store, and is relatively user-friendly. To use iMovie to join two videos, simply open the app and import the videos that you wish to combine. Then, drag and drop the clips into the order that you want them to appear in the final video. Once the clips are in place, tap on the "Share" button in the top-right corner of the screen and select "Export Movie." From here, you can choose the resolution and quality of your final video before exporting it. For Android users, there are a number of different apps that can be used to join two videos. One option is KineMaster, which is a free app with some features that require a subscription. To use KineMaster to join two videos, open the app and tap on the "+" button in the bottom-left corner of the screen. Tap "Media" and select the videos that you wish to.