You can check vshare sites in different browsers to see if they works, also you can try uploading.

For converting video, vshare use ffmpeg/mencoder, so if they are installed properly on server, you will be able to upload any supported format to your server and get it converted to FLV format.

You can see list of sites using vshare at

http://forums.buyscripts.in/viewforum.php?f=2

Also check live demo

http://video.bizhat.com