My teacher had told me that the Calvin Cycle must happen twice and he divided the molecules used in this video in half....... is that still ok?

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It sounds like he was saying that the cycle must happen twice if you start with 1 glucose molecule.  Glycolysis takes 1 molecule of glucose (C₆H₁₂O₆) and makes 2 molecules of pyruvate. Each pyruvate is then converted to acetyl-CoA through the PDH complex (pyruvate dehydrogenase complex) before it enters the Calvin Cycle. If you started with 1 molecule of glucose, then 2 molecules of acetyl-CoA can enter the Calvin Cycle.