Not the documentary but:
https://en.wikipedia.org/wiki/Star_shaft
And related: https://en.wikipedia.org/wiki/Orion_correlation_theory
https://en.wikipedia.org/wiki/Star_shaft
And related: https://en.wikipedia.org/wiki/Orion_correlation_theory
Edit: yup yup. The wiki link gave the name of the documentary, and of course it's on youtube: https://www.youtube.com/watch?v=cfgRF1e66_8