Interactive screencast

Hello,

I am a UNITY Quest developer and wanted to ask a question.

Is there a way where we can control the VR experience through screen cast from mobile? Like theres already a record and reset buttons while casting. 

Is it possible to provide a custom button where we can control the VR experience?

Simple Example: Pressing a button where we can play a custom sound?

Any advice on this would be appreciated. 

Thanks😊