The static folder is accessible in django

In Django, you can add photos and videos and stuff in the static folder to access it in your site.
Other people can go and access it. If I wanted to keep them(static files) not accessible what should I do.
And how can I add static files programmatically.
I want to do it using a form
Video name :-
Some more data:-
lorem :-
etc :-
And then when I click submit it should add it to the static files or the data base. I am a beginner so what I am saying might not make any sense to you.