Strictly speaking, the cool thing about viewing memories in a Pensieve (as opposed to during Legilimency) is that they are 3rd person, objective, and without bias.
If the memory is taking place via Legilimency, then it should be the person's actual memory, which is their 1st person perspective...unless it too is somewhat of a movie reel playing out in front of the person. That's the trouble with magic. It doesn't always work the way "logic" would dictate.
As for hearing things Snape couldn't have possible heard, that isn't logical and I do have more difficulty understanding how it's possible. It seems like they should almost just have their mouths move but he can't understand them.
You might also look at what Snape says about Legilimency and Occlumency, because he does talk about what can be gleaned that way, which might help you. I believe it comes down to using your emotions to get you to think of the relevant memory, not that the memories themselves show emotions.
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If the memory is taking place via Legilimency, then it should be the person's actual memory, which is their 1st person perspective...unless it too is somewhat of a movie reel playing out in front of the person. That's the trouble with magic. It doesn't always work the way "logic" would dictate.
As for hearing things Snape couldn't have possible heard, that isn't logical and I do have more difficulty understanding how it's possible. It seems like they should almost just have their mouths move but he can't understand them.
You might also look at what Snape says about Legilimency and Occlumency, because he does talk about what can be gleaned that way, which might help you. I believe it comes down to using your emotions to get you to think of the relevant memory, not that the memories themselves show emotions.