Live events and live content are legally tricky. First, because there are usually multiple rights-holders to the various content being performed, and second, because a rebroadcast of that content is often deemed to be a performance or exhibition in its own right. That means lawyers, and licenses, and paperwork, and the exchange of currency. Tangentially, there's also the issue of getting releases from people who appear in the video, and things of that nature.

Live content is a huge opportunity. Content is often a tangled web.