Square Dance Machine old people watching theater video player kind of on the computer can read a video file but the player shows nothing how to solve?

Should be the problem of the video format, if you download the video online most of the FLV format, your player does not support, so you need to convert the format can be ... ... The video is not a good one, but it is a good one.

If it's an MP4, you'll have to see if there's a specific folder where you can read it.