How do you create a video and share the screen in the same training videos

We often use a video switcher that allows us to bring in multiple video sources (cameras, computer screens, tablets, etc) and then perform a live switch between the different sources. There are also instances when we capture computer screens with screen capture software like Telestream Screenflow or TechSmith's Camtasia and capture the video with a seperate camera or webcam. After capturing we do an edit with Final Cut Pro or Adobe Premiere to combine the screencast with live-action video. When recording the audio it's best to use a quality microphone - there are some inexpensive usb mics that do a great job. If you have a lot of on-camera and screencast footage that needs to be synced you can use a program like PluralEyes to lock your sync.