Why can't I play the square dance after downloading it to my memory card, but I can't play it when I put it into my multifunctional video player?

Hello! As long as the disk read out do not play, open my computer, right-click on the vcd drive, choose to open, you can copy and paste directly into the computer, you can also direct the mouse to drag the file into the already open my computer in a partition, such as my documents.