The FLV file format is supported, but FLV files will be shown as progressive download only. Ultimately, this means that users will not be able to fast-forward to any part of the video that hasn’t been downloaded yet. For small files (under a minute long or so) this is not that noticeable. But if you wish to provide true streaming with longer videos, consider
having GravityLab encode and host your videos as Windows Media and Quicktime. This will ensure that your audience is receiving the optimal experience with your content. Are you absolutely convinced that you want to use flash? Contact us for a custom quote for true flash delivery using the Flash Media Server.