One of the most impressive things you can do is, try searching up a landmark. My personal favorite is the [Jumping Stone](https://www.youtube.com/watch?v=u1TtMN8nXTM) on the Nias Island of Indonesia. What would have otherwise just remained a novel tourist attraction, forgotten by the modernity of the 21st century, is now essentially a "tag" which has hours of footage associated with it. Thousands of tourists travelling back and forth, locals growing old, new people being born, buildings being built and demolished around it. You can even just study how video quality improved in that particular region. That there IS something wholly unique to this era and definitely worth preserving. YouTube as a company has figured the logistics of storing it, but the question of how humans can hope to read such data remains yet unanswered.