Visual evidence is tricky to acquire without access to the actual thing your documentary is about. As the reading itself says: “Making a documentary with visual evidence requires the filmmaker to go out and find something happening in front of the camera that that tells the story to the audience far better than any interview with an expert.” That said, it’s hardly an impossible obstacle to overcome. If I were in the position of having to do so for a documentary about COVID Nurses, I’d probably try to include a variety of approaches for the sake of minimize the need to reuse clips and ensure there’s enough visual variety as to not distract the viewers. I’d include not only actors to re-enact certain scenarios being described in the documentary, but also things such as b-roll footage of various tasks being performed or panning over locations. Perhaps footage could even be taken in other locations where vaguely similar things to the nurse duties and covid infection could be taking place. It would all have to be incidental, and I’d have to react quickly to them, but if it could capture those moments I’m looking for, then that would go a long way to helping out the documentary.