Why real player cannot play flv video files?
RealPlayer can support such formts: MP3, WMA, AAC, AC3, MPGE1,
FLASH, Realvideo, AVI. Currently, RealPlayer can't play FLV files.
Many other media players such as Windows Media Player, QuickTime,
VLC Player, Winamp don't support FLV files.
So in order to play flv files, an flv player is needed. You can
download Aunsoft FLV Player to view flv videos. It's free and
easy-to-use. It can open local flv files or those from Youtube,
Google Video, Yahoo Video, Myspace, etc.