If you want to stream your pre-recorded video, and switch to the actual live in the same stream, you can follow these steps:
1. Set up your Pre-recorded Video Layer and click Scenes
2. Click on Plus Icon to add a new Scene.
3. Add a new scene with a Web Cam layer (make sure that your microphone is connected as well).
4. Activate Instant Scene Swith mode and launch your stream by clicking GO Live button.
5. Now your pre-recorded video is live.
6. Once you're ready to switch from a Pre-recorded video to an actual live, just click on a Scene with your Web Cam layer, and it will be synchronized with live right away.