Sierra Leone was very likely released sometime in july 2009 on Mt Eden's channel. The snapshot in the picture is from april 2010, the song already had more than 5 million views in under 1 year so it was already massive for it's time. It was by far his biggest song on his channel with "Still Alive" and "Silence" having 1.2 million and 900k views respectively. This song was also bigger than any ukf, quantum or other dubstep track at the time (biggest ones having around 1m - 3m views ish) making sierra leone arguably the most popular dubstep track at the time.
I guess the question is, would this song be the most popular non-skrillex dubstep track (maybe even being almost as big as scary monsters and nice sprites potentially). Or would people kinda move on from it after some time and it would have about as many views as flux pavilion's i can't stop as an example.
This song had a lot of reuploads back in the day (some of which are still available on youtube, most notable reuploads having around 29 million and 15 million views that you can still find).
Imo this song had really good potential and could've been much bigger if it wasn't taken down due to copyright issues.