Have an old CRT that only has RF input and a raspberry pi zero w/ 2w? Then check out this article I found on a pihat that allows you to connect your pi zero w/2w to your old TV. https://www.hackster.io/news/generate-rf-modulated-video-with-the-pimod-zero-17092439453e?fbclid=IwAR1dbU1ZUfq-RmM5f9W1I8wDMWYB473MT66-bINnXqq47dvPP3fzfEQNmd4