Are there any libraries for this available yet? What are the solutions we will use to verify authenticity? Will live speaking events become more valuable as a

Are there any libraries for this available yet? What are the solutions we will use to verify authenticity? Will live speaking events become more valuable as a result? Many different angles of video will probably not be of much use alone, but useful for public events. I can imagine events in which the audience is surrounding the speaker, creating difficult-to-replicate-from-multiple-angles background noise. But this is just delaying the inevitable.