I've been surprised by the success of this 7 min
animation on Dewey
codes, from the Finnish libraries (kirjastokaista.fi):
It's been on the front page of YouTube in Finland for several days now,
even as top 1 trending video. It reached 200k views and counting.
As far as I know, no "serious" video on Wikipedia or other Wikimedia
projects has reached such a virality. (Although I see a Stephen Colbert
and an alltime10s video with 1M views each.) Maybe we can learn
something from it?
The video is part of a series by this Tuomas Toivainen: