dmWidgetExternalVideoPlugin

• In a console, from your project root dir, run:

git clone git://github.com/ornicar/dmWidgetExternalVideoPlugin.git plugins/dmWidgetExternalVideoPlugin  

• In config/ProjectConfiguration.class.php, add dmWidgetExternalVideoPlugin to the list of enabled plugins:

class ProjectConfiguration extends dmProjectConfiguration
{  
  public function setup()  
  {  
    parent::setup();  
 
    $this->enablePlugins(array(  
      // your enabled plugins  
      'dmWidgetExternalVideoPlugin'  
    ));  

• In a console, from your project root dir, run:

php symfony dm:setup  

After installing the plugin, three new widgets are available: Youtube, Dailymotion and Vimeo.
Add a widget on a page. Give the video url, the width and the height.

The video url is the url visible in your browser address bar when browsing a video website.
Exemple of video urls:
youtube: "http://www.youtube.com/watch?v=LWbj7FYEi3M"
dailymotion: "http://www.dailymotion.com/video/xc1g5i_le-clarinettiste-raphael-severe_news"
vimeo: "http://vimeo.com/8461260"

If you want to host your videos, or need more customization, you should give a try to dmFlowPlayerPlugin