I'm fine with people having some private discussions. The more formal the discussion is, and the more public the implications of the discussions are, then the more I think that the discussions should be public with the exception of discussions involving information which there is a strong reason to keep confidential such as certain types of banking information or information which would de-anonymize an individual good faith contributor to the Wikimedia projects who has not consented to having their identity published. Binding policy decisions which are mare through RfCs should have the final RfCs be public, although private discussions about the RfCs are fine so long as they don't involve canvassing or meatpuppetry.
I'm fine with what Nicole's publication of the video in its current form, and I'm thankful that we got the video at all. She wasn't required to publish any of it, although I think that publishing it was a good idea and is beneficial.
There are legal issues involved with recording people without their knowledge, and these laws vary by jurisdiction. I generally don't encourage people to record video and/or audio of meetings without the knowledge of everyone who is participating, especially if they have not researched the relevant local laws. As a courtesy, even if recording video and/or audio of people without their knowledge is legally allowed, I usually encourage notification of people who will be recorded and giving them a chance to opt out.