If it's a problem, you can always rename the flv in admin panel. That will screw up the code on the thief's page.

If you're talking about downloading the file versus preventing hotlinking, that's not the same thing. Yes, they can download the flv just by getting the URL when they "view source". Anything is copy-able from the internet. If you don't want something copied, then don't put it on the internet to begin with. There is always Screen Shots, Screen recording software, access to direct URL's, Temp folders and all kinds of things. If someone wants it bad enough, they WILL get it.

What this thread is concerned with is HOTLINKING, which uses YOUR bandwidth, that YOU have to pay for and the hotlinker doesn't (not about downloading your files).

To make a directory so that nothing can be downloaded from it, password protect the directory. Consult with your webhost about password protection for directories. I don't know how passwording a directory will affect vShare script when people go to watch a video on your site. My guess is that it will crash the script.