This is plugin to make embedded videos from youtube, vimeo, dailymortion, hulu, blip… responsive.

Download link:  http://wordpress.org/extend/plugins/responsive-video-embeds/

This a cool plugin (http://wordpress.org/extend/plugins/responsive-video-embeds/), automatically resize  embedded videos in wordpress to the screen size.

Supported formats

• YouTube
• Vimeo
• DailyMotion
• Blip.tv
• Viddler
• hulu.com
• Revision 3
• Funny or Die
• WordPress.tv
• Scribd

Test link: http://www.kevinleary.net/responsive-video-embeds-plugin-example/ .
(Resize the browser and watch the videos automatically scale to fit the browser resolution)