Is there anyway to edit .flv video files I downloaded from youtube?

I used realplayer to download some videos from youtube to my hard drive. I have ulead video studio 11 but it doesn't recognize the .flv file type. Is it possible for me to edit these videos?

Moyea FLV Editor Ultimate is a powerful FLV editor with powerful functions. You can not only trim FLV, merge FLV, split FLV, replace FLV audio, and add metadata and cue point, but also save all settings as project file for future editing. You can even generate SWF (with various player skins, special effects, and preloaders options) and HTML files for uploading to website and blog. Besides all above, it perfectly cooperates with YouTube FLV Downloader and FLV to Video Converter which enables you to integrate all your FLV fun, download FLV, edit FLV, upload FLV to your website and blog, convert FLV to formats for playing back on Windows Media Player, DVD Player (needs burning software), QuickTime Player, iPod, iPhone, PSP, Pocket PC, Zune, etc.
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