Do not know what to do. There must have been a lot of people who had have my problem with black flimmer in the video start?
It seems that all video from Vimeo start playing from black. I have put in the video, which is 100 % clean cut in the start, on the portfolio page. http://sub.blomqvistproduktion.se/trendy/ I guess you will find it.
The header on this page is placed in another video container (not Vimeo or revolution slider) and it starts also in black.
I give it up and accept it.
Why is a cover image necessary whatsoever?