Recording in the standard Blue Jeans service can be done in two different ways: 1) If someone joins a meeting as a moderator they can start a recording while in the meeting using the record button on the interface. This limited to PC users or mobile device app users for the most part. You currently can not start the recording from a room system. 2) When you schedule the meeting, under Advanced Options you can have the meeting automatically record.
Once the meeting is done the system will process the recording and then email that it's ready to view. You access your recordings through your Blue Jeans account home on the web. It can be kept private or has a variety of options for sharing. With a basic Blue Jeans account recording storage is limited.
It is not possible within the standard Blue Jeans service to limit who can send content, last person to send wins. However, Blue Jeans Primetime service might be able to help in this department, it acts more like a traditional webinar in my understanding of it. I am not a customer of that currently.