Amazon Prime Instant Video is a rival to Netflix, but unlike Netflix it lets you download videos to watch offline - something no other streaming service allows, unless you're counting catch-up TV such as iPlayer and All 4 (which we're not). It makes an Amazon Prime subscription all the more tempting as you also get music streaming thrown in (typically £10 per month elsewhere) and fast delivery when you order physical products from Amazon.
You'll need a subscription to Prime Instant Video (sign up for the free 30-day trial here) plus a tablet or phone to download videos. Supported devices include Amazon's own Fire hardware, all Android devices and an iPhone or iPad.
Update 18 July: Android (and Amazon Fire) owners can now download videos to SD cards in their phone or tablet. Previously it had to be stored in internal memory.
To download videos from Amazon, you'll need to get the Amazon Video app. It's free, and is available for both Android and iOS.
Once downloaded, you'll need to launch the app and log in with your Amazon details. You'll now see all of the TV shows and Movies available from Amazon. Be warned that not all instant videos are part of your Prime subscription. Look out for the Prime banner in the top right corner of the show's image to make sure you won't be charged extra to watch
Not every video is available to download, but it's easy to see which are. Click a show or movie you'd like to watch and look for the download button. If it's a TV show, the download button is a downwards arrow situated next to the play button on each episode. If it's a movie, the download button is just below the green 'Watch Now'.
Tap the button to start the download. You'll want to be connected to WiFi as this will use a fair bit of data. Downloading an episode or movie can take quite a while too, so make sure you give yourself plenty of time.
Once downloaded, you'll be able to find your movies and TV shows in the downloads section of the app. Use the tabs at the top of the downloads section to switch between your movies and your TV shows.
Simply press play to start watching, even if you're not connected to the internet.