I am having problems downloading videos from a website...

I have successfully set up my download filters, and DownloadStudio successfully finds the video files I want to download. However, instead of downloading them it just simply queues them and remains in a permanently 'downloading' state without actually downloading a single byte of video... I don't have any restriction on file size or number.

I have had no problem downloading images from the same site, and was wondering what my problem might be?

Any answers would be most appreciated... Thanks.