Error 2048 in QT

That would be because of problems associated with codecs and file formats. When you see the error massage, it means something is wrong with you codec library or your video format is not compatible with your QuickTime player.
Flash Player sometimes also shows this error when it doesn't load required resources from the webpage and fails to show Flash content. Flash Player shows this error because required domains are blocked due to security purposes, or it's the server containing Flash resources might be down. So it's a kind of network issue.
You can check on the article: How to fix error 2048 on your PC?

I think you should try this program.. I use it myself and I know it plays almost all video files:

http://www.videolan.org/vlc/download-macosx.html

PS: Please rate this solution