Free FLV Converter is different, and, of course, it's free. The interface of Free FLV Converter is divided into different parts depending on the task you want to do.
You can search for a video directly on video websites (YouTube, Megavideo, dailymotion, youporn, pacoporn...), then you can decide the format you want the videos to be downloaded, because it can automatically convert the video when it's downloaded.
In case you already have the FLV video stored in the HD, you can access the tab named Conversion from FLV and choose the file you want to convert. It also allow you to convert to FLV.
If you want to download videos from YouTube in a shareable format, Free FLV converter is a good choice and if you need to convert flv to avi or flv to mpg, this is what you need. It's fast, reliable and free.