From me in PJ Media:
Consider all the things you’ve searched for, and found, on YouTube. Now consider where else you would have been able to find them absent YouTube. Nowhere. Well, perhaps somewhere, but not without onerous searching, waiting, and probably paying.
Old debates? Documentaries? Tutorials on fly fishing? Old episodes of Miami Vice? That boxing match from 1992? That cartoon you watched as a kid? Winston Churchill speeches? Phil Collins singing at Live Aid? You found it all on YouTube.