opera video problem v51.0.2830.40

[A Former User]

A Former User last edited by

I don't know what's the problem with opera, i kept all this day try to find solution to this problem, the video in opera appears with a black screen like this video
https://www.youtube.com/watch?v=SKVnSMqaAtI&feature=youtu.be
but when i try to play it in firefox there is no problem with it, it's play with out any problem ,

and there more video in facebook and twitter have the same problem
opera version 51.0.2830.40
i can't do any thing without opera.
please tell me what to do
thanks.!
photos for problem
https://drive.google.com/open?id=1WByzX5CLrQWEsJJj-Y2RKztkrjYP68K4
another one
https://drive.google.com/file/d/1DpkMzmolxRMb6mmjzVwCxxTiaEghraG2/view