This picture again?
This is cool sh*t to think about. But I would think, as amazing as the brain is, it would be impossible to relive every single part of your life. I can't even remember what I ate for lunch a few days ago, how am I gonna retain every movie I've ever seen (for example) word for word and relive that sh*t.
I can see reliving prominent moments, but your life in its entirety? Nah.
U may not b able to activly do it but your brain has every moment of your life saved. Ever have a random childhood memory, something you haven't thought about in years maybe a decade. There are about 5-7 known people who can actively do this. Recall every moment as if poppin in a dvd.