To buy video content, just click the link on the Store's main page for the type you want—a music video, a movie, or a TV show. Apple's full-length movie library is small but growing. You'll see titles like Pirates of the Caribbean, National Treasure, and a handful of Disney classics like Dumbo and The Little Mermaid. Compared to little ol' song files, movies can take up a ton of hard drive space—a full gigabyte or more—so be prepared for a download time of 30 minutes or more, depending on your Internet connection.
If you want to watch a movie but not own it, check the flick's Store page to see if it's available for rental. Rentals cost less than $5 and download just like regular iTunes Store-purchased movies that you can play on your iPod or computer. You have 30 days to start watching the rental and 24 hours to finish it, but it means never having to wait for Netflix—or slog to the video store in the rain.
Dozens of old and new TV classics are also available, including episodes from Heroes, The Daily Show, and Grey's Anatomy. You can buy single episodes or entire seasons at once. Sign up for a Season Pass and you get each new show automatically as it's released. TV shows are big files, too: one 30-minute episode of 30 Rock, for instance, is close to 300 megabytes.
Once you purchase and download the files from the iTunes Store—just click the Buy button next to ...