There is a Flex "channel" at vimeo.com, and these videos are downloaded from there and distributed via the LangTran software distribution system. So if you get the Videos folder via LangTran, they should be in your LangTranLocal folder already.
If you don't get updates through LangTran, have a look at this
link:
lingtransoft.info/apps/langtran
The information there will help you decide if you want to use LangTran, and help you decide which update method to use, BitTorrent Sync or a script based on rsync.
Jim