Not only are online videos becoming more and more popular, they are becoming easier to create and post online. File size and format are two very important factors to consider when posting a video online. Encoding a video (sometimes called video conversion) helps reduce the file size while maintaining the quality. By using Microsoft Expression Encoder to encode your video, you can choose from a wide variety of video formats.
Expression Encoder is optimized for use with Microsoft Silverlight. However, you can use Expression Encoder to encode video whether or not you are using a Silverlight player.