Ok ! I can use an example everyone knows. If you click a windows media movie, Windows Media Player opens and plays it. If you dont have media player, then you have to download it. So lets say you pick a movie where the host is Veoh, then you will most likely need to download their player to view it. You can click the link and open it up but it will only allow you to see 5 minutes of the movie. To download the player click Watch on Veoh TV on the top right screen, and it should install it. Go back to the originating link and then you will be able to view it.