I believe that free will is not opposed to determinism. I believe that free will is determinism in a sense that we are free to choose whatever we will but that choice is predetermined not by a God, but by the very first few particles that created our Universe. I maybe thinking of this in a layman's mentality, but i believe that when the Big Bang occurred, the trajectory of expansion of each individual particle of the universe was determined mathematically. Theory of conservation of energy, resolution of forces. Given the trajectory of the 2 particles that collided, this is the exact way the universe is meant to be.
Dinosaurs, humans and animals don't play out of this either. Because of the butterfly effect, it may be hard to agree with determinism, but it's all like a perfectly tuned mechanical clockwork. A petal was meant to fall on the lake. A man was meant to see it when he was 3 years old. That affects his mentality like a pivot, as all things do when one is young. Based on previous experiences, he draws conclusions and perceptions. This affects how he reacts to something else in a specific manner which in turn affects something else in a specific manner. It goes on and on, all predetermined even before he was born. I am meant to type this word here, just as you are meant to read (or not read) it. Grim as it seems, i believe everything is mathematically bound and is therefore precise. Our free will is actually determined by our minds, which are shaped by experiences and memories, are they not?

I have done no research on this, but based on that guy talking on one of those channels, i believe it correlates with the theory of everything? The one formula that summarizes our entire universe, physical and even social