Ask HN: Best video conference API with Archiving?

I have a client who wants to build a video chat website to pair individuals together for chat sessions.

They want the ability to archive the videos for legal and research reasons. They've checked out TokBox and it seems like the most well-suited API, but they said the TokBox people were asking too much for the Archiving feature at scale.

Does anyone know of any other open web-based video APIs that let you archive sessions?