So from the beginning you're looking at two different lengths and types of content. Is 30 seconds more "shareable"? Probably. Does a pop song climbing the charts earn the music video more publicity? Probably. Can you then compare lifetimes of these two memes against each other and draw conclusions? No probably not. It's apples and oranges.
Maybe it's just a bad infographic, but I feel there are a lot of valid conclusions that could have been drawn from this type of analysis. But instead of that you get comparisons without explanation of why these memes are different and have different characteristics. I think they could have looked at two long-form music video memes or two short 30-second video clip memes, drawn better comparisons and put together a more complete and accurate analysis of these memes.
PSY is a joke from the beginning, as is LMFAO et al. Harlem Shake was originally just a song which got somehow mixed up with a crazy dance and that went viral.
Oh, "Each video was led by an individual or organization with massive reach – YouTube", yeah, real deep analysis. Much more interesting would be to break down into who posted what videos, who was hyping them on twitter, and so on.
Could the influencers and their actions described in the qz article be spotted by some form of algorithmic analysis? Now that would be interesting.
The first rule of viral marketing club is that you do not talk about viral marketing club.
The analysis claims that Gangnam Style had a "leader" and Harlem Shake was distributed. However, this is a kind of warping of the fact that Gangnam style was viral and satisfying in its own right, whereas much of Harlem Shake's value came from the parody videos and the fact it was a "thing people are doing."
There's no mention of the fact that Gangnam Style could and did make it to the radio in recognizable form. There's no mention of the length of the video, the season they were released, the "singability" of the content, the production value, actions of pr/production agencies, or countless other factors that could have a larger effect than the identified parameters.
I always thought big media invented the harlem shake, because they failed to see Gangnam Style rising for several months.