It work but not as well as i would like. In fact, impossible to go upon 650px :/
That’s likely so the video doesn’t break the layout of the main column. Could you please provide a link to a page where the video isn’t as side as you’d like so I can have a look directly?
What kind of videos are you embedding, YouTube? You could use the YouTube shortcode to append height and widths to individual videos, if you like:
http://en.support.wordpress.com/videos/youtube/
i would like to know if it’s possible to hide the background of the pictures galleries wich is black in order to just keep the picture floating on the page :-)
Could you please provide a link to an example page where you have a gallery so I can have a look?