A friend describes this feeling when reading his fictional tales.
Key characters interact in a way that would be completely different if they knew something(s), but the only person who knows that information is not part of the story and is in fact the reader, who is omnipresent.
The best phrase I can come to is: 'stress from knowing the consequences and potential differences in reality from the ignorance of others'
I would go as far to say that this word would most likely need to be a phrase in English and could apply to any situation where one experiences stress from others being ignorant and/or experiencing the result of being ignorant, regardless of the context.
Additionally, I would argue that a secondhand emotion is not a likely choice to hold this description. The ignorant are only living the stress from the result of their ignorance.
The actors (fictitious or real) merely feel as they do under the spell of their own ignorance while the one experiencing 'stress from knowing the consequences and potential differences in reality from the ignorance of others' is third-person, omniscient OR universal omniscient (depending on depth of context) with or beyond the omniscient narrator.
In scope of time, the word/phrase would not necessarily be interconnected with foresight. Information is known at a moment of time that is relative to the information becoming of breath/thought to the actors. There would not necessarily be any form of knowing the future, merely knowing all perspectives of the focused actors collectively as a third, observing and unaffected party.
I would wager to say that this question is not a duplicate. I am in search of a word/phrase that describes the feeling, not the action/activity.
Appreciate the help!