Means all speakers are available for watching, I think through 10am EST the next day. It's been pretty interesting, in terms of learning what's good for us to eat and what isn't.
Diet matters, in terms of the nutrition or lack of that we give our body to deal with. It affects our gut bacteria, called the microbiome. It affects every system and every tissue in our body.
I suggest you just browse through them to see who's interesting to listen to...