He then goes on to lecture for an hour (more or less) about his study:
What does this mean, you are (or are not) free to wonder. You are not alone. Others have decided, in some fashion, to try to clarify the situation for you. See the study:
“What Does the Free Will Theorem Actually Prove?” Sheldon Goldstein, Daniel V. Tausk, Roderich Tumulka, and Nino Zanghì,” Notices of the AMS [American Mathematical Society], Volume 57, Number 11, December, 2010.
BONUS: Princeton University’s guide to the above video and some related videos, and to your larger adventure in free will exploration.