Why can you only hear the sound but not see the picture when you watch square dancing on your computer after blacking out?

Hello: There are two situations, one is that your computer configuration is not enough, that is to say, low memory, running too slow, the video can not open, and another situation is that the network is too slow, or card,

You can open the video now when the other programs will be closed, so that you can light to watch the video.

I hope my answer can help you.