Play or cast content from standard player into VrVideoView

Question

I got an android app that plays live/vod content using QuickPlay.

This QuickPlay player / controller configured to use ExoPlayer.

I didn't wrote this application, but asked to add Play in VR functionality.

It could be Cardboard, DayDream or GearVR doesn't matter.

I found SimplyVrVideoActivity sample by Google,

In this sample the VrWidgetView can get 2 types of input:

• mVrVideoView.loadVideoFromAsset(LoaclAsset.mp4, options)
• mVrVideoView.loadVideo(Uri, options)

What if I just want to "cast" already playing content to this VrVideoView, any ideas?