Many sites desiring video will choose to use a third-party video provider such as YouTube or Blip.TV. This reduces the bandwidth requirement from their server, is easy to include in their posts, and allows videos to be easily shared virtually by users across the Internet.
Drupal is one of the premier platform for video integration. We cab embed video of all formats in Drupal using video integration modules.
The easiest way, without further configuration of a basic Drupal installation, for an administrator to include a third-party video is to simply paste the video's embedded code in a post. Most video providers will offer a snippet of HTML that may be copied from a particular video page, which will embed the video.
However, this requires using a filter that will allow <object>, <embed>, and <param>