Legal Question in Business Law in California

While you may be able to set up the cameras to avoid capturing the image of any individual in the crowd, in my experience this is exceptionally difficult to do and, invariably, you will fall a bit short of the mark in this effort. Accordingly, when capturing imagery and sound in a scenario like this it is the best practice to post notices at all entry points and at strategic points within the venue advising attendees that you are taping, streaming, and perhaps capturing images of attendees and for storage and potential subsequent replay. The other consideration is that if you have performers at these venues, you must make sure that they sign off and grant you the rights to capture their images and performances and the right to broadcast/webcast that material in real time and/or for subsequent replay.

There could possibly be other issues related to trademark and copyright infringement that are typically fact/circumstance specific. To give you proper advice I would need more information on what exactly you would be doing with the video/sound collected. Feel free to contact me directly to discuss further.