I don't get this at all.. or rather if I do get it, then it worries me a lot. A video is definitely not supposed to try and get you to download anything.

Are you sure this movie isn't rerouting you to some rogue site?

Hi and thanks for your response. What is happening is that I go into the folder in which the downloaded movie is stored. I then click on it to start it. The movie starts and then a message comes onto the screen over the playing movie saying something like "you are trying to play a High Definition movie and we require you to download VLC Media Player. We hope that this does not cause you any problems". Then, the movie stops and all of a sudden the browser is in front of me with the Download screen of VLC Media Player. As I said on Bitzi, it has happened three times with what I thought were three different versions of the movie (all titled differently) but they all turned out to be the same. And the rest you know.