Below is an article covering what these files are, how they work, and how to manage them.
Digital Rights Management (DRM) is a set of access control technologies used by hardware manufacturers, publishers, and copyright holders to limit the use of digital content. When applied to an MP4 container, it ensures that only "authorized" users—those who have purchased or rented the content—can view it. How Does it Work? Below is an article covering what these files
Always use the application you used to download the file. how they work
Offline downloads from platforms like Netflix or YouTube. Below is an article covering what these files
Movies purchased from the Apple TV app or Amazon Prime Video.