I thought something about this had been posted in the forum but I can't seem to find it when I do a search. This is a mod to make a standard Vectrex display colors. It looks cool. Towards the end of the video, there's an explanation of how this was accomplished.
It makes me think of the terrible sin that was committed while I worked at both E!/Style/G4 (now part of NBCU) and Disney|ABC. We scrapped hundreds of professional CRT video monitors to make room for the newer LCDs. We also scrapped analog XY scopes and a bunch of other gear that would of been useful for today's retro gaming enthusiasts. Hopefully some of those items made it onto Ebay and into the hands of old time gamers. Well, time to be penitent.
^Oh yeah, it's ludicrous some of the stuff that's been done, just like a photo I saw of some expo years ago (I think it was on Atari Age) where someone made the very rare Computer Space (one of the very first commercial coin-op games ever) into a...Ms. Pac-Man?! Ugh.