uhmmm, do u have a mac or pc?
i have a mac, so im not sure what u would use for pc, but google something like: flv converter for itunes
or something like that.....
or u might be able to download the flv converter on the conversion site...? not sure
and for any other conversions, just google it (that's how i found this one)
i know there's loads for google video, youtube, myspace, etc...