Do you mean to host the files?
If so, any website service will work. You could use a Windows server running IIS, or even use a Mac mini or caching server with tomcat or apache.
Providing your Apple TV can reach it, it will work. I would almost recommend hosting internally, rather than using public hosting.
do you know how i would do this with iis? or with a caching server?
So there are many guides out there, and it will depend on your available resources.
A modern macOS will require some software, maybe MAMP as an example
Here is the Microsoft guide - https://learn.microsoft.com/en-us/iis/manage/creating-websites/scenario-build-a-static-website-on-iis
However, for whatever you use, it just needs to be able to host files via HTTP/HTTPS.
You dont need a full-blown website, just the URL of the files