Corbyn won the Labour leadership on the back of a social media campaign. He completely trounced the opposition, despite the entire party & established media lining up against him.
While it remains to be seen how effectively that can be applied to the wider electorate, what did become clear throughout the leadership campaign was that Corbyn is a very effective communicator when he's able to get heard. He isn't going to get a fair hearing from the establishment media, so he needs to find ways of bypassing it.
I don't like the idea of fireside chats or some trews type show, but some way of speaking directly to the electorate is necessary rather than desirable, if he wants to get anywhere. Comparing something that doesn't exist yet to hamfisted previous attempts at it seems a bit premature.