HT201290: If QuickTime Player can't open an audio or video file

Learn about If QuickTime Player can't open an audio or video file
SpirosM

Q: m4v files

I have downloaded two training videos in m4v files. The first was played but not the second.

Any ideas what might be the case?

MacBook Pro (Retina, Mid 2012), OS X Mavericks (10.9.2)

Posted on May 6, 2014 3:32 PM