Maybe a demo on how to record a lesson?

I watched Pamela's talk about the cs program at Khan academy and I think it's very, very cool.
I cloned you repository locally, the demos work fine, but I saw that there is no recording example.

Is there some private code missing that could not be made open source?

If you add your transloaditAuthKey and transloaditTemplate the record buttons appear and you can safely record a lesson with audio and code. So the functionality is there, just the call to saveRecord is missing.

Will this tool be made open source also, or a demo, or can I help in making one?

Thanks.

Review the existing demos and the code path where transloaditAuthKey and transloaditTemplate make the record buttons appear. Trace the missing saveRecord call and clarify whether the requested contribution is an open recording demo or documentation of the existing flow. Done means the scope is explicit and a lesson recording can be safely saved in the demo.

Written by the indexing model from the issue text.