Then maybe you should hire a web consultant/developer earning $100+ US an hour instead of coming to a free forum, run by hobby volunteers with little actual free time, making apparent demands about something you seemingly know nothing about, and spent money on anyway.
You've not given enough detail for even an intelligent person to know EXACTLY what you are talking about.
Here's my guess.
You have a web server.
https://blah.com/You take the loading screen folder and upload it to your web server root folder.
Your URL then becomes
https://blah.com/myloadingscreenfoldernameIt's not our fault you don't know HTML. There are plenty of tutorial sites, including at the W3 organization that standardizes the whole HTML version heirarchy.