cfmjohn

Found this on the interwebs - it's got info for a few different units in the range, including the one you're looking for. Prosound Smart Manual.pdf

Is there any chance the affected desktops/laptops are connected to a corporate VPN and could be accessing the stream via a tunnel back to the office instead of direct from their home connection to YouTube?

Ideally you'd want to try and use TVI, AHD or CVI as they'll give you the HD resolution that the camera is capable of. CVBS is composite video so you'll only get a standard definition picture with lower image quality. Something like this box would probably work - though I have no personal experience of it. Just watch out for the note on the listing saying it will default to 720p resolution and you need to press a button to switch to 1080p each time you turn it on. There weren't many options on Amazon - maybe you'd have more options from a CCTV supplier.