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Often painted as a rival to Netflix and Lovefilm, Blinkbox is best thought of as Blockbuster for the digital age, with the Tesco-branded service operating in the same DVD release window as Sky, Now TV, iTunes and Virgin Movies. That means it has the latest titles sooner than both Netflix and Lovefilm.

iTunes

Apple is a bit like Marmite – you either love it or loathe it – and the same goes for its media-rich offspring, iTunes . The store is targeted primarily at an audience of iFans – those with iPhones, iPads and Apple TV – although Apple also caters for those that want to download the latest TV show or movie to their PC, provided they don't mind watching it in the iTunes desktop app.

As well as the latest movies and TV, iTunes has one huge advantage in that most of its content (be it TV shows or movies) is available in high definition, which puts it head and shoulders above LoveFilm's standard definition line-up. You'll have to wait for it though - there's no instant access streaming here. You have to download anything you want to watch, and with the HD stuff that's going to take some time

YouView

A platform for other catch-up content rather than offering anything genuinely new in itself, YouView is nevertheless something of a God-send for watch-again addicts. If you're after streaming movies, however, look away now.

It's a small black box, offered either as a standalone product from Humax or as part of BT Vision's newest offering . The brainchild of the terrestrial broadcasters in the UK, it's possible to go backwards in the electronic programme guide and watch anything you want (providing it's on the BBC iPlayer, ITV Player, 4OD or Demand Five). No Smart TV offers that, but YouView doesn't offer what those smart TVs do, either, namely Netflix or Lovefilm apps.

TVCatchup

If you're after straight live TV on a portable device, TVCatchup is hard to beat, though it may have just received its death sentence . According to TV Licensing, if you're watching a programme as it happens live then you do need a licence, but if you're only watching on-demand services that show programmes after they're aired then you don't.

TVCatchup falls into the former category; despite its name, you need a TV licence because it lets you to watch TV as it happens. You can access content from over 40 different channels, including BBC One, Film 4 and Dave. Although the site states that these programs are free to watch, technically you still have to pay to watch them since you need to buy a TV licence, but it's a moot point if you already happen to own one.

Demand 5

Think waiting 20 seconds for programmes in ITV Player is bad? Then you won't like Demand 5 , where the adverts are exactly 108 seconds long. Surely on-demand TV should be instantaneous?

Confusingly the website – which contains material broadcast on Channel 5, 5USA and 5* – doesn't show any adverts, and while there are a suite of basic apps for the iPhone and iPad , they only allow streaming, not downloads. What use is that when you're bored on a train and a plane?

Android users have less luck, with no app and just advice to watch in a browser , though that's only likely to work with older versions of Android that support flash-based video. Demand Five is also available on Virgin Media and Sky, and YouView, and Xbox 360. PS3 users can watch via a channel on YouTube.