4:85 While she is explaining the experiment, she says that “Victor sends a particle to Alice and Bob simultaneously.”

But the word particle in physics and especially in Quantum Mechanics is undefined. High energy physicists call a statistical “bump” in data a particle. A particle can be a wave. It can be a sphere with a finite radius. Or it can be a mathematical point. All these things and many more are called "particle". So we have no idea what Victor sends to Alice and Bob unless she takes the time to define it, but she doesn’t.