For online video, delivering it with Flash is your best bet. Flash gives you the ability to create a fully customized and branded streaming experience for the end user. Other streaming formats and platforms stream through players that cannot be customized, or that are extremely difficult to embed and integrate into a customized environment and require expensive development and testing to do so. Further, ad insertion, closed captioning and selective player controls are also quite easy to integrate in Flash video applications. The ubiquity of the Flash player and fast download time of the plug-in allows you to reach a much larger audience.