Earlier this month Facebook celebrated its 10-year anniversary by introducing "Look Back" videos, bite sized glimpses at what each of us have shared on the social network over the years. Depending on how active a person you are on the site, these short clips may fill you with overwhelming nostalgia as you look back over time gone by. But Facebook's videos are capable of more than that - they can also serve as brief reminders of who you are and the kind of life you've lived, and they can do this even after you're gone.

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