If you don't see the extensions, you may need to go to your folder settings and uncheck 4. Technical Context
If you are sure the file is safe, use a versatile media player that can handle both MKV and MP4 containers. LUSTY LOVER.mkv.mp4
If you downloaded this from an untrusted source or an email, do not open it . If you don't see the extensions, you may
: This is the most reliable tool. It plays almost any video format regardless of the extension. If you don't see the extensions
When a file ends in .mkv.mp4 , it might actually be an executable file (like .exe ) disguised as a video.