Why do I get the message "Corrupted media encountered during playback” when I try to play a video on my PC?
The file you are playing is either corrupted or is in a format not supported by RealPlayer.
A file can become corrupted for a variety of reasons. If you originally downloaded the video from the internet, re-download the video and then try to play it again.
For more about unsupported file types, read this article.