How did the images become webps if these are 15-20+ year old CDs?

I have a python script that copies the CD's file structure and then batch converts all images to webp, I have another script that then populates the "finder" style website html from a template. For CDs that already have a viewer website I have a seperate script that goes through any html file and converts any image "href" links to ".webp" :3 (this is mainly because of the 1gb neocities limitation)