The move is part of YouView's ongoing industry engagement programme, as it attempts to "open up the nation's TV screens to the widest possible range of content types".
The venture, cleared by Ofcom last month, aims to upgrade the Freeview and Freesat platforms to support video on-demand (VOD) and internet services.
In the first phase of its content providers programme, YouView will focus on identifying a "small number" of VOD and audio providers to work with the venture's technical team to develop and test the processes for making their content available on the platform.
As the technical environment develops, the programme will be extended to other types of content, including web applications and IP channels.
The UK's four public service broadcasters - the BBC, ITV, Channel 4 and Five - are already involved in the project as joint venture partners. Other possible content partners could include British broadcaster UKTV - operator of the Watch, Dave and Good Food digital channels - and the major US studios.
Sky chief executive Jeremy Darroch even recently admitted that the satellite broadcaster could agree a deal with YouView, despite previously opposing the IPTV service.
YouView, previously Project Canvas, has also alerted consumer electronics manufacturers that may wish to bring YouView devices to market next year.
"I'm delighted to launch our industry engagement programme and look forward to seeing the response from across the UK's rich and vibrant content community," said Richard Halton, YouView's chief executive.
"Our ambition is to open up the TV screen to content providers who until now have been unable to build an audience, bringing viewers a brilliant choice of content."
He added: "YouView is creating an open environment for content providers to play in and this will take some technical innovation. To develop the most effective processes for content providers we need to at first work closely with a few that can prove our model and ensure it's scalable.
"Our plan is to extend the programme out as we start to build common expertise and get more great content on board. We're seeing a vibrant ecosystem developing in the IPTV market and are also committed to helping this flourish and grow in the best way to meet the needs of content providers."
Last week, YouView announced the advertising and marketing agency lineup which will support its launch in the first half of 2011.