4K Ultra HD TVs have been around for a while now, but the lack of content has been more than a little disappointing. Things are starting to change, though, with Netflix and Amazon delivering on-demand programming and BT stepping into the ring with the UK?s first Ultra HD live channel: BT Sport Ultra HD.

As we?ve come to expect from BT, the new channel is streamed over the internet directly to a YouView set-top box - in this case, the brand-new Humax DTR-T4000. The benefit of the YouView system is that internet channels appear in the YouView guide alongside broadcast channels and you can even record them. It?s this blurring of traditional and internet content that continues to make YouView a real winner in my eyes.

In terms of size and looks, the DTR-T4000 is practically identical to the Full HD YouView+ box, which remains on sale. Aside from a few cosmetic differences to the front panel, the big change is that there?s an Ultra HD sticker on the front and an HDMI 2.0 output on the rear, which supports HDCP 2.2 content protection. It has a 1TB hard disk, which is enough for around 600 hours of SD content, 250 hours of HD and 60 hours of Ultra HD.

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Setup and connection

It?s important to hook the YouView box's HDMI output up to the correct HDMI port on your TV, as many only have one 4K input. It?s also worth checking the BT site for compatibility, as some older TVs will not play nicely with this box. I tested with the excellent Panasonic AX802 50in TV and had no problems getting connected.

BT supplies an HDMI cable in the box, which you won?t need to change, as Expert Reviews has proved that expensive cables make no difference to picture quality. Other than that, the YouView box has to be connected to the internet and, if you want live channels, an aerial socket. Given the bandwidth that you?ll need for Ultra HD, a direct Ethernet connection to your router is the best connection method; HomePlug adaptors should work, but I recommend buying 500Mbit/s adaptors to ensure that there?s enough bandwidth if your router?s not close enough to your TV.

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Talking of the router, if you?re not using the Home Hub 5 then there?s a chance that you might run into some problems getting the internet channels. I?d replaced my Home Hub with a DD-WRT router in order to get US Netflix on a Chromecast, but DD-WRT doesn?t play nicely with the multicast technology that BT uses to deliver internet channels. Switching the Home Hub 5 back as the primary router fixed my problems.

As with every other YouView box I?ve tested, the DTR-4000 is incredibly slow to start up when set to High Eco mode, which is designed to save power; you can switch it to Low mode, but we found that it got incredibly hot and its fans whirred noisily even while it was in standby.

BT Sport and Ultra HD content

The primary purpose of this box is to deliver BT Sport in glorious Ultra HD, 3,840x2,160 at 50fps ? that?s double the frame rate of traditional TV. The short summary is, wow. The extra resolution makes a massive difference, with every single bit of detail there. I tested it with a Premiership football match and the improvement over HD was clearly visible: grass was full of texture, the ball was easier to see and the players looked clearer and cleaner. As soon as I started watching it was clear that the picture was impressive, but switching back to the HD feed truly showed how much better 4K is - the older channel looked softer in comparison.

Sport truly benefits from the 50fps footage, as fast-paced action is easier to follow and considerably less jerky. There are some other benefits to the service, including 10-bit colour. It can make some parts of the screen look a little lurid, but general the picture pops with that extra vibrancy that normal TV lacks.

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Delivering this content requires a fairly hefty broadband connection. I'm lucky enough to live about 15m from the roadside box, and typically get around 74Mbit/s when using speed testing websites and tools. I calculated that the TV stream was taking up around 29Mbit/s ? no wonder this service is only available to Infinity customers. Even Infinity customers on Opton 1 (38Mbit/s) that live any real distance from their fibre cabinet might find their connections unable to cope, or at the very least seriously impact their web browsing speeds while streaming Ultra HD. At least the service doesn?t slow down with more people using it, as BT uses multicast to deliver TV.

Our one issue is that there?s currently very little content available on the Ultra HD channel, outside of the Premiership, Champions League, FA Cup, Premiership Rugby and MotoGP there?s not a lot on. In fact, for a lot of the time, the Ultra HD channel is just a set of adverts on a loop. Dive into the BT app via YouView and there are a few bits of Ultra HD content that you can watch, but it?s essentially demo footage, such as a video of some snowboarders, rather than movies and TV shows.

TV and catch-up

As well as the Ultra HD package, you get everything that you normally get with one of BT?s TV packages. I won?t go into the full details again here, as that?s covered in detail in the BT YouView+ review. In short, YouView is a top set-top box platform. I still love its intelligent EPG, which lets you step back in time and watch on-demand shows that you?ve missed via players for all of the main terrestrial channels. There are also additional apps to expand your content, including Sky Now TV, Blinkbox and BT?s own app. Additionally, you can add additional channels delivered via IP (for a fee), including an HD channel package (Fox, MTV, SyFy, TLC and others) and Sky Sports 1 and 2, which aren?t available in HD.

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You get the same remote control as with other BT YouView boxes, which I think?s a little large, but everything?s clearly labeled and the buttons are responsive.

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Netflix is a surprising omission from the DTR-T4000, as it?s been a standard app with every other YouView box. The issue is that Netflix has yet to certify the new box, although it should be coming later in the year, including Ultra HD streams. We have to say that the lack of Netflix shouldn?t be a big problem for most people, as the majority of 4K TVs that the BT YouView box will work with already have 4K Netflix clients built in.


Getting BT Ultra HD costs ?15 a month, with a potential one-off ?44 engineer installation fee for those people that might not be confident in setting up the box. Existing customers also have to pay a ?49 fee for the YouView Ultra HD box, although new customers get this box for free. You also have to have a BT Infinity Option 1 or Option 2 broadband account.


BT has ushered in a new era of TV, doing something that you might not have thought was possible a few weeks ago: making HD channels look bad. It?s a shame that there isn?t more Ultra HD content available, but for sports junkies (primarily football fans) you won?t get better quality anywhere else. Given the number of matches that you?ll get this year, the ?15 a month fee is very competitive.

We?d love BT to add more Ultra HD channels into the mix, especially as it?s getting the exclusive AMC channel in the UK and its The Walking Dead spinoff, Fear the Walking Dead. Of course, this is just the early days of Ultra HD, with Sky already deep in the planning stages of its own rival platform; knowing Sky, its launch is bound to be bigger and with more content.

Still, all that aside, BT has managed to do something that no other broadcaster has managed and it?s done it in high quality. Finally, we can say that Ultra HD has arrived.

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