But obviously there is broad support for MPEG-DASH on other devices. Because otherwise the app would have the same limitations there too. But I’m pretty sure that those devices will also support HLS. So you could also argue that if there are two very popular protocols out there, you should support both. And that you can’t expect from the BBC to change their protocol just because of that one streaming device out there.
But I don’t want to take a side on this. In the end it’s just the usual blame game of big companies. And the customer has to pay the price for it.