Hi Francesca,
I was specifically referring to the rewards for the film campaign which, as you showed, all indicate an "estimated delivery" of August 2014. That would be consistent with my statement about him having "until September" to make good on them.
As far as the film credits, I think most people figure that those would not be "delivered" until the post production of the film itself is completed and subsequently screened (which the Indiegogo page indicates will happen in late September).
I can see how people might assume the film would be posted on Youtube (though not necessarily on his Youtube channel) but I don't see anywhere that he stated in the Indiegogo page itself where exactly it would be screened. I have other friends who've done crowd-funded film projects and they use both Youtube and Vimeo pretty much interchangeably (even simultaneously) to get the widest audience possible. While the difference might seem subtle to some, there are good reasons why one might want to keep a documentary film posted separately from a Youtube channel, though it would certainly make sense to still promote the film through the Youtube channel, if that channel still exists.
When you contribute to a project on the big crowd-funding sites I think you have to provide an e-mail address along the way (if not directly then via the payment handling entity, e.g., Amazon payments) where you can receive notifications about the status of your contribution, the project and any promised rewards. They're not dependent on contributors having access to a specific Youtube channel to know what's going on. At least, that's my understanding.