01. Mom And Daughter.mkv.mp4 «90% INSTANT»

Drag the file into a Google Chrome tab. Chrome has built-in support for many common video codecs and may play it directly. 3. Fix the Filename (Remove Double Extension)

Remove the extra .mkv or .mp4 so only one remains (e.g., 01. Mom And Daughter.mp4 ). Select the file and press Command + I to "Get Info." Under Name & Extension , delete the unnecessary extension. 4. Convert if Unplayable 01. Mom And Daughter.mkv.mp4

Because of the potential format confusion, it is best to use a "universal" media player that can handle almost any codec. Drag the file into a Google Chrome tab

If renaming the file doesn't work and it still won't play, the "wrapper" might be broken. You can "remux" or convert it to a standard format: 01. Mom And Daughter.mkv.mp4