Hello,
I can create for you an application for IOS, android and also win 8 phone.
Your application would be really simple and I think you have a pretty good idea of what you want, so it will be easy to design together.
Also for the update part ( where you and your collaborators add articles, videos, etc ... ) we can create a small web interface ( that part will require some additional time, like one week more at 533 AUD ) but I think that you might want a lighter version, so this is subject to discussion, that's why I don't put it within the global price.
Please send me a message if you're interested.