Animutation is actually pretty popular in Japan. Sometimes Japanese netizens would make misleading links to animutations such as Suzukisan and Hyakugojyuuichi in a similar fashion to Rickrolling. In Japan, Hyakkugojyuuichi is considered a classic flash animation much like it is in the west, perhaps even more remembered.
RWBY is also popular in Japan. Besides fansubbed and fandubbed episodes and fan videos that are uploaded on Nico Nico Douga, Warner Bros. Japan began officially releasing it in December 2015. That same month, a manga based on the show began publishing.
It's apparently popular enough in China to inspire a fandub as well. And now a Chinese developer is making a mobile game!
What makes this interesting is that the series really wasn't that popular in the United States — according to Rooster Teeth co-founder Burnie Burns, the only reason RWBY kept going after Volume 1 was because of its popularity in Japan, which convinced them to keep going. And then RWBY really broke out.