I am trying to create a documentary about the history of a sports team, and have identified some compelling story arcs. However, as we know in reality, stories do not begin and end one at a time:
story 1 exposition story 1 rising action story 1 climax story 1 falling action story 1 resolution story 2 exposition story 2 rising action story 2 climax story 2 falling action story 2 resolution
but rather are interwoven
story 1 exposition story 1 rising action story 2 exposition story 1 climax story 2 rising action story 1 falling action story 2 climax story 2 falling action story 1 resolution story 2 resolution
I can easily modify my documentary to make scene transitions seamless/connected by having a connecting theme. BUT this doesn't ensure the viewer can identify the 2 different story arcs and feel the satisfaction that all plots were explored and resolved. To them, the interwoven structure above just looks like a bunch of connected scenes with no overall meaning.
What do screenwriters do to ensure viewers don't get lost and remind them that there is a (set of) journeys to be payed off that they should keep watching to get rewarded with? Apart from just narration which explicitly identifies the 2 separate plots, I don't get how this is done (I'm an amateur screenwriter with no training). But since I don't want to rely on English narration (I want people from other countries to watch it too), I'm wondering if there are any non-narrater ways to help orient viewers.