Depending on your ambitions for a project like this, many digital humanities centers would need some outside support in order to assist with a effort by someone outside their home institutions. Start-up funding from an NEH grant, for instance, would help. And regional THATCamp events are often excellent places to meet up with faculty and staff from DH centers, publishers, humanities agencies, and cultural heritage institutions and find out about opportunities to collaborate.
You may also want to register on the new DH Commons site, which is designed for people seeking collaborators or offering collaborative opportunities.
If you are looking for publishing platforms or journals that support multi-media work, you should consider MediaCommons and Vectors. The Vectors team is also working on a new digital publishing tool, Scalar.