Basically I have a problem when embeding youtube videos. It is only displaying a black screen and no video is playing or coming up? When I try vimeo it is fine the vimeo video displays and plays but with long black borders either side of it. Attached image below.

I do not get this problem with any other theme such as default or any others and I have installed this mod properly for my custom theme.
My theme details are as follows.
Theme name: Bright
Author: Pipee
Theme type: responsive bootstrap
I purchased it from smftricks.com
It only seems to be a problem with that theme? I have contacted the theme author but not heard anything back yet. Can you help?