There are many reasons for limited access to media such as images and videos: for example, knowledge, personal data or teaching material that has been released for limited use should be protected. The Joomla component ensures that certain content is only made visible after a login.
You add your pictures and videos to the website as usual. Media that should not be visible without authorization are protected by the component.
The protected material is only accessible online with a password; only those who have registered with the appropriate access data can view the protected content.
Read more https://extensions.joomla.org/browse/new/extension/access-a-security/jmg-media-access-manager
