I absolutely love Zencoder! Highly recommended.<p>I wanted to encourage our customers to upload screencast style video demos of their apps to be presented within a product shot of an iPhone or iPad on their website (e.g. <a href="http://aeirtalk.com/" rel="nofollow">http://aeirtalk.com/</a> and <a href="http://homemarks.limelightapp.com/" rel="nofollow">http://homemarks.limelightapp.com/</a>). In order to present the videos using HTML 5, it turned out we must encode the videos into three different formats (H.264, Ogg Theora, WebM.) Zencoder's API request builder made this a total breeze! I don't think I ever read the API documentation. Furthermore, I never have to worry about what format our customers are uploading.<p>We don't do a ton of video encoding, so our bill is never more than a few bucks a month. It's better than free when you consider how much time we didn't waste maintaining a server with ffmpeg on it. :)