Creating exclusive page without a shareable link

Site URL: https://www.snoozedays.com/

Hi community! I am looking to create a page that will display a video to only those who have donated money. 

I want this page to not be accessible to people who have not donated (therefore, a page that cannot be shared with a link & if it is shared by copying and pasting the html code it brings up the donation page before accessing the video page)

I have no coding knowledge or know how to go about this so any help is appreciated and if a coder is out there please leave your details!

Thank you everyone.

I think this is complex.

You can setup page password & share password for who donated.