How do I choose the right video format (MPEG-4 or FLV)?
This decision depends on the Flash Player version you need to target and your existing encoding workflow. To use H.264 video, Flash Player 9,0,115 (released December 2007) or later is required. FLV (VP6 or Spark codec) is supported in Flash Player 8 and later. H.264 video tends to achieve higher quality at lower bit rates, so it may be your preferred choice if you can target newer versions of Flash Player. If your workflow already includes H.264, you can easily repurpose that content for delivery on the Flash Platform.