This is a recording of a test image which is ping-ponged by a VHS & an old PCI TV Card connected to each other via SCART. Each flicker is one generation skip. You can see how the image gets completely destroyed due to the old analogue connection method. White turns black, yellow & cyan turn dark-green... Don't ask me why green wins in the end but the cool color morphing is being generated completely analogue. :)
Also, the audio was recorded. What you hear is the analogue ground noise being multipled by 2 each flicker. (I think the TV card limited it by hardware once it became too loud so an some point the volume stops increasing).
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https://www.youtube.com/watch?v=Qh4ck-OQi0Q