T46G - manually configure a door camera

[MM@BI]

Hi guys,

so I've ran into a little issue with my T46G.
My Starface PBX can display our door cameras on the phone's screen without any problem.
We actually released a video to show it works a while ago.
https://www.youtube.com/watch?v=RxQO_7sEjsM

I also can manually watch a video stream if I enter my camera's image URL (the phone itself builds a stream by frequently taking single pictures from the camera)
under
Features -> Door Phone -> Camera URL
Which works fine as well.

What i can't figure out is how to take the video from there on my phone's screen without involving the Starface PBX.
How can I configure a key to display the video? Or can I link it to a phonebook entry to display it when I'm getting a call?

This is a necessary feature for any other PBX and smaller stuff like home routers and I'm fairly sure it should be possible, so can anyone help me out?