Where can you upload fetish videos and monetize them?

I have a good archive of fetish videos, I know in some websites they upload these and put them on private to be unlocked by payment or something, or via some premium links to monetize.

What is a good way to make money from this collection of fetish videos?

You can upload your videos to platforms that pay for views - such as doodstream and similar sites, and then share the viewing link
Some adult tubes allow to upload videos to their sites with external links in title and description

There are specialised adult platforms for that sort of thing, highly depends on what type of content exactly. Like for some more audio-focused content (there's also video there but it's mostly fetish ASMRs and such) Rplay exists. If and when you do find one, X is a good place to build an audience to direct to your chosen site.