The problems like this can have different reasons, that's why we have listed the most famous below. It may also happen that the reader suddenly stops working and that video stops working. Or you will only have the sound without image when opening the video. In this case, you cannot play video file. Now it happens that the WMP meet dysfunctions on Windows 10.
But at the moment know that there are also other reading applications such as VLC media player ou Movies and TV (recommended by Windows 10 for the Video player) but also Groove Music (recommended by Windows 10 for the audio player).
It is an application developed by Microsoft. Le Windows Media Player or more simply WMP allows play media files on your computer.