How to show content when click on button and show another content when visit the link directly

hello everyone i need to know the name of this option How to show content when click on button on website and show another content when visit the link directly we have 2 website and 2 visitor let's give name to each one visitor1 visitor2 site1 site2 visitor1 enter to site1 and click on button that go to site2 that have video player of the movie until now everything is OK but when visitor2 enter the site2 directly from the browser it see different content here is the video that show you what i want to see exactly https://drive.google.com/file/d/1glw2I8huKj-45CPmT51HDR6iRqftcQKV/view i really need your help and thanks for the help in advance