The Remote Helper app enables apps to control your computer and stream video and audio files to your devices. Unfortunately, it can’t be hosted on the Mac App Store or Windows App Store due to limitations imposed by Apple and Microsoft.
The app simulates user keyboard and mouse input to control the computer remotely, and apps in the stores are not allowed to do this. The helper app only works on your local network (it can be a new network created on your computer or even your iPhone hotspot).
The helper app is free and can be installed on as many computers as you need.