When i put watch Video, the screen remains black like this :

https://gyazo.com/8b5e68b44c91fc0b4df1c847d6d618a2

This happened only today ,was working fine in the past.

I haven't tried reset the cookies, but i did try different browsers and different devices and same result. However some people seem able to watch the vids since they are new comments.

What could this be?

Thanks