Office Dev Show - Episode 9 - Getting Started with Cross-platform Apps

Office Dev Show File Handlers and Smartsheet - Episode 10
In this episode of the Office Dev Show Dorrene Brown and Ken Adamson, of Smartsheet, show us what File Handlers are, what contexts they are enabled, and how to get them running in your own environments.
Happy Coding!
Is it possible to create and register additional FileHandlers for file types that already have one? For comparison the Windows File Explorer allows one application for "Open" but many for "Open With"