Lookback

Observers are silent Members, and unless told so, the participant won't know anyone is watching. <a href="https://help.lookback.io/en/articles/477883-what-are-the-differences-between-collaborators-observers-and-owners" rel="nofollow noopener noreferrer" target="_blank">Observers</a> cannot voice chat with each other or the Moderator, however  all observers and the moderator can <a href="https://help.lookback.io/en/articles/3904692-how-to-act-as-an-observer-in-lookback-sessions" rel="nofollow noopener noreferrer" target="_blank">chat</a> with each other, as well as take notes, which will be time-stamped=glued to the moment in the recording when it was made. 

So <a href="https://help.lookback.io/en/articles/477883-what-are-the-differences-between-collaborators-observers-and-owners" rel="nofollow noopener noreferrer" target="_blank">Observers</a> are not able to interact with the Participant, because Participants don't know that Observers are present in the session.

<a href="https://help.lookback.io/en/articles/3904692-how-to-act-as-an-observer-in-lookback-sessions" rel="nofollow noopener noreferrer" target="_blank">Tips on how to act as an Observer in Lookback Sessions</a>

<a href="http://help.lookback.io/en/articles/4869704-can-i-hand-over-the-role-of-moderator-during-a-live-session">Hand over the role of Moderator during a live session</a>

- <a href="https://help.lookback.io/en/articles/3904692-how-to-act-as-an-observer-in-lookback-sessions" rel="nofollow noopener noreferrer" target="_blank">Tips on how to act as an Observer in Lookback Sessions</a>
- <a href="http://help.lookback.io/en/articles/4869704-can-i-hand-over-the-role-of-moderator-during-a-live-session">Hand over the role of Moderator during a live session</a>

In short: No, the only ones who can voice chat are the Moderator of the session and the Participant.

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