Watched 30 minutes and pretty much didn't get what he wanted to express, which is pretty fine because I'm not well versed in the art of Physics.
Just one thing about probability. My theory is that we use probability because we don't really understand the true "why" of things, or we don't know them. For example, we use probabiliy to guide us when playing poker, but that's because we don't know the cards. Whence we know the cards there is no need for probability.
But again, he is probably not speaking about the same "level" of things. I wish I knew more Physics.
I'm with you, we use probability to wave away effects we don't understand or cannot measure. There's a flat rate probability that each of us has cancer right now, when perfect knowledge of our bodies could answer the question precisely. Each doctor exam we have reduces or increases that probability until we subjectively understand it's time to sample a point of the body and know for certain.
The local sample is related to the larger system, and the hidden variable (cancer or not). The local sample at the time of capture has a probability of being malignant. We measure directly and back propagate the results to the system.
But, unintuitively, there's been some famous results that seemingly preclude a deterministic explanation of quantum mechanics. See:
Just one thing about probability. My theory is that we use probability because we don't really understand the true "why" of things, or we don't know them. For example, we use probabiliy to guide us when playing poker, but that's because we don't know the cards. Whence we know the cards there is no need for probability.
But again, he is probably not speaking about the same "level" of things. I wish I knew more Physics.