Accessibility problem

Hello !

First of all, thank you for your great plugin.

I try to have a label of accessibility on my site but I have a problem with your plugin.
I have an embed Youtube video in the lightbox.When I open the lightbox, I can press ESC to close the lightbox. But If I open the lightbox, than press TAB to focus to the video element (like “play”), than press ESC, the lightbox do not close. This is because we are inside the iframe and the iframe only use its own scripts.

In order to resolve this issue, could you please add this closing script inside of the iframe ?
Maybe something like :

parent.jQuery.colorbox.close() when ESC is pressed ?

Thank you in advance,
Cédric

https://wordpress.org/plugins/lightbox-plus/