Have you ever seen the error, ‘Cannot play, Video codec not supported?’ What is a codec and why do we need it to play a video file? A codec is a software or hardware-based process which is used to ...

Welcome back to Ask TUAW, our weekly troubleshooting Q&A column. This week we have questions about changing file ownership and permissions, adding two external displays to a MacBook Pro, converting ...

Usually, when you have a video file on your iPad or iPhone, the file can play on that device—why else would it be there? But occasionally you’ll run into a need to convert a video file, like I did ...