Black video window
black video player on some sites as example http://www.dailymotion.com/video/x1yortf_escena-de-x-men-dias-del-futuro-pasado-proyectada-en-the-amazing-spider-man-2-en-espanol_shortfilms Attachments: [img]https://forum.vivaldi.net/uploads/attachments/79192/black.JPG[/img]
Perhaps you Windows has not the correct Flash Player.
Please read https://help.vivaldi.com/article/install-flash-player-for-vivaldi/
Do you have Windows 7? I read about some video not running with this OS.
May be a Update to Vivaldi's Latest Snapshot will help you.
i had Flash Player but don't know that version PPAPI so important…
test on windows 8.1 and windows 7