There was an app called Samsung MilkVR that had the option to trigger a
Synchronized Video Playback on multiple Gear VRs on the same network.
However, it is no longer on the Oculus Library. The samsung app has been
renamed to Samsung VR recently, whi...
Solved : I factory reset my phone, made sure the phone is identified as
US IP, then plugged in the device into the Gear VR, then search in the
Oculus app list for Samsung VR and install it. Followed the FAQ steps in
the link above. And it is now work...
Here is a link to a FAQ for Samsung VR regarding Synchronized Video
Playback,https://samsungvr.com/portal/content/gear_vr_synchronizationIf
only we can get Samsung VR to run on Gear VR...