Post History
If I understand you correctly, the subject of your documentary is standing on the brink of a major change: there's his life up to "now" (what you call "act 1"), and then there's the way things will...
Answer
#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/38581 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/38581 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
If I understand you correctly, the subject of your documentary is standing on the brink of a major change: there's his life up to "now" (what you call "act 1"), and then there's the way things will unfold from now on. The thing is, you do not yet know how things will unfold - you're documenting events as they occur. The story is still unfolding. Because events are still unfolding, you cannot know what choices are going to lead to what results, what might turn out to be a success or a failure or a dead end. You even say "_potentially_ important shift in a friend's life" - so it might turn out to be not important at all? With this many unknowns, it's hard to frame a story. So, if I was in your place, I'd **start shooting, and think about how arrange the material later**. Once you have all the story before you, and hours upon hours of footage, you can arrange it in a way that tells the story best. Then would be the time to employ what you know about the "3 act structure", or any other narrative tool.