Youtube videos do not stop when closing modal windows

[Manoj Solanki]

In a modal window, when viewing a youtube video (or probably similar), if the video is not paused before closing it, it will still be playing in the background (even though it cannot be seen). When opening the modal window again, it will still be playing.

[Trille Hassager]

I have the same problem - video/audio not stopping in modal when closing.