14477mp4 -

: Use QuickTime Player or press the Spacebar for a Quick Look.

: Right-click the file and select Open with > Windows Media Player or Movies & TV . 14477mp4

: If the file won't open, use a tool like Mediainfo or a Hex Viewer to see if it starts with the standard MP4 signature ftyp . 2. Opening the File : Use QuickTime Player or press the Spacebar