In which I obtain a completely unsuspecting video camera for $40 which includes an incredibly rare cathode ray tube technology that almost nobody knows exists. Fun! Prizes! A bad picture!
For more information about this technology you can't do better than this blog: https://visions4netjournal.com/indextron/
REGARDING THE WHINING NOISE: I am so sorry! I did run a filter which I thought had removed it, but apparently I'm no longer sensitive to the higher components of the CRT whine. I will do better in the future.
I recommend you don't scrape all the indextron tubes off of ebay unless you intend to make your own videos; they're rare as hell and largely unpreserved.