Issue with ONVIF Doorbell Camera

I am using a Bell J5 based ONVIF Camera, however Home Assistant doesn’t show anything.

I can get this working if I install an ONVIF camera software on my computer so I know ONVIF is working from the doorbell.

It does find the camera when I configure it and has it as an entity but it just shows a grey box and won’t play when I click on it.

I have ensured that ffmpeg is enabled and tried removing / readding but I can’t get it to display anything at all from the camera.