While the actual recording itself would still require hardware and at least one person to man a microphone / camera, hosting the resulting files via one of the online vid services could externalize that cost.
Storage is not the issue. Cameras and at least one person per room to do recording and ensure that the hardware/cameras don't go walking are. Given that no one wants to man a camera in one room for a full day, it really means a team of probably about 20 or more volunteers willing to not only record, but also manage the editing and uploading. That is not trivial, and except for a couple of people saying "I'll audiorecord my session" this list has not now (nor has it ever) overflowed with those willing to offer their own labor for the fruits they wish to reap. It's not that it can't be done. It's that it's much more human labor than most people recognize and far more people want the product delivered without doing the work to create said product. Nancy