That recursive picture is a pict that my grayscale QuickCam (An old Connectix product for the Mac) captured that I then converted to a jpeg and posted. I apologize for black bleed on the high contrast white to dark edges but it was the best my particular QuickCam could do in that lighting where I wanted to washout the background to isolate the platinum SE/30. Modern cameras put QuickCam to shame but in its day it was an amazing product, the little ball that did a lot.
QuickCam comes with a little spherical camera with a 1/4-20 tripod mount hole and a funny triangular hat rubber base that has a matching spherical indentation for the ball camera to rest when used without tripod as a teleconferencing cam. There's also some Connectix application software and driver extension that you install that is built on Quicktime, and when you start it up it opens that continuously updated window that I call the Live Monitor Composition Window. There you can aim the camera, adjust a number of parameters including brightness, and even specify single, or multiple time lapse capture. The size of the window is limited to what's in my picture, but there is very little delay between moving the camera and seeing the window update. It's not really live like a CCTV monitor, but pretty close. When you finally get the picture composed right there is a button, menu, and keyboard shortcut that commands grabbing everything in that composition window, not the whole SE/30 screen, as a 320x240 pict (although, I think you can also do the command shift 3 thing and do a screen snapshot too, working around the application!). There's also a movie capture mode.
The QuickCam driver appears to follow the QuickTime rules for video sources, so if you install QuickCam and call it up, and then invoke AppleVideophone, Videophone will see the live feed from the cam as an available video source and if you select it, work with it as your local camera. I have not tried this on SE/30 but it works well on PB1400/MacOS 8.6. If you are into QuickTime programming, you could cut code that worked with the frames as they were captured to do motion detection for example.
And the grayscale QuickCam, but not the later color version, was powered from the serial port alone and had an internal microphone. Perhaps a bit ahead of its time like the Compacts.