Here’s a curve ball and a cunning trick..
As Rich suggested, you could put a screen on an SBC and turn it into a user interface / web broswer for OH.
Now take that a step further and use an Android tablet, you could use the fabulous IP Webcam Pro app and provide the video and audio from the tablet to your network.
With a choice of video and audio formats.
Throw into the mix that the app has motion detection, 2 way audio support, automatic night mode, stealth mode, GET command on Motion and you have yourself not only a great intercom but the most covert CCTV you could get…
I’ve got this running on an old Samsung S3 phone, which is “doing nothing” on a shelf, with it’s back to the room.
That same S3 is also running a GSM gateway server, so I can send and receive SMS in OH.
(it’s not difficult to filter the senders of text messages to add a layer of security)
It’s got a third app running that auto answers calls and switches on the speaker 
all for a LOT less than the cost of a CCTV camera with a poor quality camera
Did I mention that you can remotely activate the flash light and (digitally) zoom in with Pavel’s IPWebcamPro app?
I “could” mount the phone / device on a Servo driven mount for Pan & Tilt via Art-Net / sACN / DMX control from OH, but that it probably way more than is needed. 
(But I might do it anyway, now that I’ve thought about it)
AND that Pavel has written a IP Video to DirectShow app for Windows and Linux for his App, which I can use in Jinx! to influence my Art-Net LED array, but that is probably taking it all a little too far
Update
I’ve just been told that those pan and tilt assemblies are quite lumpy when they are running, but the idea is sound