Re-enactment? Of what?
There is a re-enactment of a normal family that has an addicted son (Ben) and an addicted daughter (Isla). In the re-enactment, the older sister (Cassandra) and the mother wants both Ben and Isla to stop using their phones so much as they are addicted. The mother first starts off with taking their phones away when they are having dinner. After that, she make a bet with Ben that if he doesn't touch his phone for an entire week then she will fix his broken screen. He soon finds out that he can't go without his phone for a week. Meanwhile Isla is facing her own problems as people are making fun of her online. This re-enactment really shows that being addicted can affect you both mentally and socially. Afterwards, Ben goes to a protest and ends up getting arrested wrongfully, which shows the audience that bad things can also happen to you when you are extremely addicted. 

Narrator / voice-over? Who is telling the story?
There are many different people telling the story. It is mainly a lot of experts that give their own point of view, and they narrate and times and sometimes they use a voice over. They all take turns through-out the film to give their own story.

Scripted dialogue? Who wrote the lines, i.e., who was really speaking?
The people being interviewed  were speaking with no script. None of the dialogue was scripted because they were giving their own personal stories and point of view the entire time. The only time that there was scripted dialogue was when they cut to TedTalks by Tristan, people at meetings, and the re-enactments. I think that for the TedTalk, Tristan wrote the lines himself, and the same goes for the scenes with people at meetings talking about the topic. However, for the re-enactment, I think that the people who wrote the lines for them were experts like Tristan, Tim and possibly also the Director, Jeff Orlowski. This was because they wanted the re-enactment to mean something, and show how being addicted to this type of technology can affect a family, and the people addicted themselves. 

Conversational dialogue? Who was speaking?
There was conversational dialogue, mainly in the re-enactments in the documentary. The conversational dialogue was between the family, when they were discussing about no phones during dinner, the bet the mom made with Ben,  Isla talking to her mother, etc. Additionally there was Conversation dialogue when Ben was talking to the girl he liked. Additionally when Ben was practising his TedTalk there was some dialogue, since he asked the stage manager if it was good. Lastly, there is conversational dialogue between the AI where they discuss what they will do to make Ben go back on his phone and use it again. There are also bits where the interviewer asks the different experts some questions too.