The Great Subscriber War was between PewDiePie vs T-Series YouTube channels .
PewDiePie vs T-Series was an online competition between two YouTube channels , PewDiePie ( run by Felix Kjellberg ) and T-Series ( an Indian record company run by Bhushan Kumar ) for the title of the most-subscribed channel on YouTube , which was ultimately won by T-Series .
PewDiePie vs T-Series