Your turn now https://vatelier.net/MyDemo/AframeDiscovery/
Honestly it works but I just don't really what good can come out of this. It's all about 3D and experiences. Yes... surely videos can be used in a fun but the point of VR is to escape the flat screen.
Exercise : prove me wrong. I'm serious.
PS: note that you can still do a LOT with video especially going down the stack and using WebGL shaders. For example check those amazing projects