VLC MEDIA PLAYER

Now on the internet .flv format is famous for video streaming online. like youtube, metacafe e.t.c. you also can download that video and save to your computer, but you must have .flv player. cooldown now you can try flv media player with free cost and powerful feature.you can download now, and this program is opensources.
VLC is a powerful free media player capable of playing almost any Video/Audio file format out there without the need of any extra codecs you can play other format like .wmv .mp4 and more too.