To be honest I think that the 'regressive left' that right wing youtubers spend so much time complaining about is largely imaginary; I've even come across youtube channels that edit chants by black lives matters protests in order to make them sound violent. For example a chant might go 'We won't rest, we won't stop, until killer cops are in the dock,'. and a right wing youtuber might then edit it to 'we won't stop, killer cop', and then claim that the protestors are shouting 'we won't stop; kill a cop'. I think those youtubers do this because they know that their audience won't be skeptical. Pandering to the views of the alt right means guaranteed views and Patreon support, which means more money for them.