It peaked in 2012-2014 and has gone downhill since the rise of recommendation algorithm optimization. The signs were there before, with the rise of let's player

It peaked in 2012-2014 and has gone downhill since the rise of recommendation algorithm optimization. The signs were there before, with the rise of let's players and the existence of things like Machinima, but there was a turning point when that became the vast majority of channels.