The documentary was called "Behind the Curve" and featured Bob Knodel. Unfortunately he passed away this year. https://www.robertsfhsc.com/obituary/RobertBob-Knodel
It looks like you still believed in the theory though. He had a YouTube channel that was devoted to flat Earth conspiracy.
We have seen this game 100 times. Opt in for now and then turned on for everyone 6-12 months later. It's just a temporary move to handle the bad PR.