All you actually need to do is paste the video URL into the content area. Please make sure the URL is on it’s own line and not clickable (hyperlinked). See the below post example:

Here is how you can add Post Thumbnails in WordPress:

http://www.youtube.com/watch?v=ID

Wasn’t that super easy.

Here are the white listed providers that can use the above functionality:

  1. YouTube
  2. Vimeo
  3. DailyMotion
  4. blip.tv
  5. Flickr (both videos and images)
  6. Viddler
  7. Hulu
  8. Qik
  9. Revision3
  10. Scribd
  11. Photobucket
  12. PollDaddy
  13. Google Video
  14. SmugMug

If you upload your videos or other media on one of these sites, then WordPress will automatically embed. Otherwise, you would have to post the embed code manually.