The video isn't playing

The video isn't playing

It would help a lot if you actually provided the basic information, such as -

the video's you wish to view, what platform they're on, the device(s) you're using, the OS(s) used and version(s), the media player(s) you are trying to use to view the media, etc?

There have been others who have also had problems, in the interim I'd suggest a quick search to see if any of those are helpful, as it may just be a setting somewhere?