Expand the Name & Extension category as shown in the image above. Under the file name field you should see a checkbox labeled Hide extension. Uncheck this box to have the Mac OS display this file ...

In this screen, put a check mark in the checkbox labeled File name extensions. You can now close Windows Explorer. You will now be able to see file name extensions in Windows 8. If you have any ...

An mp4 is a video file type, but the .mp4 in the file name is the file extension ... t change the file type? Well, file ...

Double-click the icon labeled as ‘MIME Types ... Now, type ‘.mp4’ in the ‘File Name Extension’ field. Also, enter ‘video/mp4’ in the ‘MIME Type’ text box.