I am having trouble downloading movies, and videos. Some will play some wont. The ones that wont play, wont play for different reasons, eather the network detects problems with download, or my player doesn't support the commpressed file the download came from. Now usally this accures with the movie's more the videos.

I am able to download shorts like "Baby Farts" or Girl Gone Wild clips. But movies like Finding Nemo, or The Incredibales or Kill Bill Vol. 2. Why is this happening?