Also expect at least two forced action/drama scenes that never happened.
They are staging the Hong Kong hotel meeting, of which real footage exists, as if it were an action scene.
Poitras's film contrasts the complete lack of 'action scene' with the consequences facing the protagonists.
Conveyed only by their attempts to suppress their mounting unease and the fight to calmly apply the opsec - the tension unbearably mounts second by second, the effect of distant sounds implies the real dangers.
Snowden's emotions are brutally felt, his lament at his loss left no dry eyes.
The stillness and unmoving camera style conveys more terror and excitement than jump cuts or explosive choreography can.