IP is numeric IP of remote FTP server.

URL: This should be the url to the folder where file is uploaded in FTP. That is if 1.flv is uploaded to the specified folder, it should be able to access with url http://url/1.flv

folder = once FTP is connected, some times you need to change folder (Eg: in cpanel you need to change to public_html folder), if you are using cpanel sub domain, there is no need for this change.