Sometimes I post videos to my site that aren’t in the widescreen format, so there are white bars running along the tops or sides of the .x-frame video container.
However, I noticed that every page/post has a different name for the video .x-frame.
For instance, on one page it’s .e832-17.x-frame, on another it’s .e1091-46.x-frame, on another it’s … you get the point.
Currently, I have to adjust the CSS on every page in order to get the background color to be black. Is there a global setting that can accomplish what I have to do on each and every page?