After clicking on a link on Chrome 39.0.2171.95 m the video open twice, one instance on the background, you can mute the video and listen to the other one playing. I also tested on Opera beta 27.0.1689.29 and it doesn't happen.
It's not script breaking or anything, you can reload the page and it will open normally just annoying.
Chrome open two videos
After clicking on a link on Chrome 39.0.2171.95 m the video open twice, one instance on the background, you can mute the video and listen to the other one playing. I also tested on Opera beta 27.0.1689.29 and it doesn't happen.
It's not script breaking or anything, you can reload the page and it will open normally just annoying.
Thanks for the great script.