I already see several leftist clusters on YouTube.
One is the big video-essayists, who can also be considered ‘the original BreadTube’: Contrapoints, Philosophy Tube, HBomberguy, and others along those lines. These channels are gargantuan and are watched by normies, and this is in part thanks to not being dedicated to shilling anti-capitalism so blatantly. Some of them might not even be anti-capitalist; I seem to recall Contrapoints saying she is not sold on it.
An adjacent group consists of smaller video essayists who usually do media critique. They are similar to the previous group in everything but audience size. Innuendo Studios, Jack Saint, and Maggie Mae Fish would be examples.
Another cluster is the debate bros: Destiny, Vaush, SDL, Xanderhal, Demon Mama, Dylan Burns, and the like. They are represented mainly on Twitch, and they range from anarchists to social democrats. These people tend to alienate everybody who is not a debate bro like them because their way of engaging is inherently hostile.
Yet another cluster I cannot pin down exactly. They are some combination of non-Anglos, theory nerds, and Marxist-Leninists: Hakim, Yugopnik, The Finnish Bolshevik, Luna Oi, NonCompete, BadEmpanada, Xexizy, and Anarchopac. This is the group that is most concerned with class issues.
There is also a smaller and disjointed kind of r/stupidpol medley: Caleb Maupin, Infrared, Peter Coffin. Barely anybody likes or watches them. It remains to be seen if this company grows either in members or in views.
Then there are the hyperwoke: EssenceOfThought, ALeviCalledBird, Lily Simpson, and I cannot recall any more. This is the group most concerned with trans and disability issues. I do not ever see them growing big or increasing in numbers because these people are zealots with negative charisma.
There are also two groups that do not interact much with the rest because they are not truly ‘of YouTube’: dirtbag leftist podcasters and the old radio hosts. Chapo Trap House, Cum Town, and Red Scare would be examples of the former; The Majority Report, The Jimmy Dore Show, and The David Pakman Show would be examples of the latter.
There are other people who are widely enjoyed online but are not themselves YouTubers™: Krystal Ball from Rising, Ben Burgis, Nathan J. Robinson, Richard Wolff, Zizek, and the like. Kyle Kulinski started on YouTube, but his content is more like that of radio hosts, and so I tend to also consider him as belonging to this group.
I thought ‘Krystal Ball’ was not her birth name, but it is. Incredible.
Have I covered everybody? Are there any more groups? I believe the leftist sphere of YouTube will continue to be differentiated among these lines. And these lines make sense to me, and they separate people peddling quite different content.
P. S. There are also some old-school channels I did not bother to bring up because nobody cares about them: Kristi Winters, Kevin Logan, Milo Stewart, Riley J. Dennis, and the like. There are also channels covering social issues with a leftie bent, like channels about African-American, women’s, or LGBTQ issues, but I would struggle to describe them as ‘the leftie YouTube’.
