Is a media container format designed for streaming over the Internet. Used on popular video hosting sites. Video is usually stored in h.263 and h.264 formats, audio is a in MP3 or other less popular codecs. FLV-file format is a bit stream, which provides high-quality image even at low bit rates.
Is a format for flash animation, graphics, audio and video. Its main purpose - to work on the Internet. Images in SWF format scaled to any size without loss of quality and video is small in size and loads quickly.