The only thing worse than having your work pirated is not having it pirated. The only things that stop piracy are obscurity and indifference, neither of which translate to monetary success. If your work is popular, it is going to be copied, and if your business relies on that being difficult or rare, it's going to fail eventually. Your business model needs to allow copying or, better yet, thrive on it. That might be enticing people to come to your concerts by putting clips on YouTube and encouraging ticket-holders to do the same.
YouTube will never replace the experience of actually being there, and live experiences can't be copied. This may mean we return to live-action shows rather than movies, and concerts rather than CDs. They have value because time and space are genuinely scarce, while digital copies are not, and monetary value (in this case) derives from scarcity.
Mokalus of Borg
PS - Prepare for a full-scale Broadway revival, planet Earth.
PPS - But not until the movie cinemas start to die out.