If you want to download movies your best method is to use BitTorrent, it’s a method of getting films/music.
I use http://www.utorrent.com/download.php that one, then use sites like www.thepiratebay.org or http://www.btjunkie.org/.
Then, find something you want to download.
Mininova - 
Now, the size is important, films, will always be around 700mb. The one you want to pick here is the second one down. See the link saying seeds? That means how many people are sharing it for others to download. Leechers are those who are downloading from those people. Where it is possible, try to get ones with more seeds than leechers. If not, just go for the one with the most seeders.
It’s the same here -
SE is short for seeders, LE for leechers.
It’s not advisable to download on BitTorrent while surfing or chatting on the net, as it can slow the computer right down. Your best bet is that if it’s a big file, put it on before bed, then leave it running overnight.