What is this "light trail" effect called - and how can I reproduce it today? In several video documents from the 70s or 80s, usually TV shows or live music shows, bright objects or bright lights leave behind a color trail when the subject or the camera moves. 

I remember first noticing this on a live performance of Queen recorded in the 80s. Here's another occurrence on Michael Palin's white shirt from an episode on Monty Python's Flying Circus:



I own an old 70s television camera (Pathé KC-V1) which produces the same effect, but setting it up requires a lot of time, and I haven't found yet how to digitize the video it produces, but I'd love to try and reproduce it either to make shots look vintage, or to use this effect creatively.

What is this effect called, and is there a way to reproduce this effect with digital video equipment, or in post-production?
I don't know if it has an official name but could be classed as "ringing". Tube cameras would do it if you had any bright lights in the scene. 70's music videos are full of it.

You don't mention any software, so I'll give a platform agnostic solution. This would probably be easier in a node based workflow, but I've included the AE names for things because it's what I know best.

You could use a threshold effect ("extract" would probably work in After Effects) to grab just the bright parts of the image, and feed that into a delay ("echo" in After effects) then adjust the colour before compositing it back on to the original layer, probably using an additive compositing mode ("add" or "screen" maybe in AE).