The process is more involved, as there is a potential need to convert video files to the flv format and generate the thumbnail for each video. The file conversion service cannot be run in shared hosting environments as it require an external .exe file that processes the source files. Do you have all your video files in the FLV format?

Even if I didn't, the ones that were in the incorrect format would simply not play correct? I'd like to give people the option to upload flv files without any of the conversion options; I'm assuming flowplayer will simply play flv files and ignore any other filetypes?