A DeoVR like Remote Control API https://deovr.com/documentation#remote-control would be grand!
Also, an in app web browser that can open direct media links in the VR player.
Oh yeah, something like that wouldn't be so hard I figure and would make sense, will investigate!
An in-app web browser might be slightly harder to pull off, but I'm not 100% sure until I dig deeper. My first instinct was to do it the other way, find a way to make Chrome/Firefox be able to open up MatineeVR if there is compatible formats/playback found, would that make sense to you instead of a in-app web browser or sounds not so good?
I believe DeoVR and Heresphere use a chromium backend for their in app web browsers neither of which are full featured but they work ok enough.
I have a portable website I and my users use in Heresphere and DeoVR to browse their media library from another system and stream the media via HLS to the VR player.