Actually - 99% of corporate shows with General session, keynote speakers and known talent are recorded. They usually use clips from the week in the closing video.... The content is property of the corporate client and video ops turn over everything at the end or at post con.... Most of the time when it's not recorded, it's because of strict order by the speaker or talent..... Again, that very rarely happens.
Then you have times like last night where I iphoned the camera TD's monitors (my station was right behind him) and got 6 camera views of the band - which band? Let's just say, they're really good!