Get a Quick overview what the tool has to offer: https://screencast-o-matic.com/tutorial/take-advantage-of-deluxe-video-editor
IOS APP: https://screencast-o-matic.com/iphone-ipad-screen-recorder
Android App: https://screencast-o-matic.com/android-screen-recorder
Removing the background of your webcam recording: https://screencast-o-matic.com/channel/green-screen
Adding Audio (Music) https://screencast-o-matic.com/channel/audio
Adding Captions: https://screencast-o-matic.com/channel/captions
For a full list of available tutorials, visit this page and scroll down toward the bottom
