Hi, this might be interesting for those who got it to work.
Based on this: HowTo: Viewing 360° Video in Real-Time from THETA V with Oculus Go Browser
and copying code from https://github.com/mganeko/aframe
to: https://github.com/kJh19/Test
I managed to live stream my theta from my PC to my phone and VR device as a 360 spherical image and even put them in VR/cardboard mode, using a webrowser.
The details are explained in the links, it works similar to skype or zoom.