: Ensure it actually ends in .mp4 . Sometimes "double extensions" (like .mp4.exe ) are used to hide harmful software.
: Look at the chat history or website where you downloaded it; the context is usually more telling than the name. 0h4bjnze7jco3obrsqq9r_source.mp4
: Right-click the file and select Properties (Windows) or Get Info (Mac) to see the creation date or originating URL. : Ensure it actually ends in
: Ensure it actually ends in .mp4 . Sometimes "double extensions" (like .mp4.exe ) are used to hide harmful software.
: Look at the chat history or website where you downloaded it; the context is usually more telling than the name.
: Right-click the file and select Properties (Windows) or Get Info (Mac) to see the creation date or originating URL.