I seem to have an issue with both these extensions.
When I use Fancybox to post a Youtube video, there (in spite of me following advice) is no "Close window" button on the video (the "X" on the top right to close the window), this does not bother me, I know I have to press Escape to close the window, but visitors who are not aware of this might sit there wondering how they close the video, and maybe leave the blog altogether.
Yet, when I post a popup image, the close button does appear.
Then, with PivotX Media, when I post a Youtube video, the Full Screen button does not respond to clicks,so the video has to be watched in the size it is placed on the blog.
Any suggestions, anyone?