FLV format is the most common online video format on the Internet. Almost all the videos on such websites as youtube and myspace are spread exactly in FLV format. Unfortunately this format is not included into the standard set of audio and video codecs and when trying to open the video in this format, you just see the message warning about the absence of the necessary codec. To play FLV, you can use a specialized player which is called Shock FLV Player, a small but powerful video player. It allows you to play and rewind FLV files. You just need to download this player and install it on your computer, after what you will be able to open files in the FLV format with its help.