Playing video files- sound only

[jadesh04]

[edited by moderator]
To elaborate on this issue, I have searched around on this forum and have tried everything I came across. I discovered on my lab's computers that the video wasn't even playing normally on Windows Media Player--sound only, like MediaLab--and that I needed a codec. I installed the correct one for my Windows XP and in the Player the videos played fine, but they still are messed up in MediaLab--sound only. I also tried putting the video as a background video to an Instruction page, and that did not work.