I might add, to get a free "flv" player plug-in for WinXP, just google "flv player". Worked for me.
I included the converter so that an mpeg file could be burn to CD or DVD for itsnevertoolate's family archives and TV playback.
Not knowing what your internet cache settings are, I suggest you copy the file now. Your browser settings might limit the temp cache holdings by date or cache size, in which case it would be deleted by Win IE Explorer.