The YouTube algorithm is biased towards content that encourages further engagement, anger causes that, and right wing propaganda is designed to make people angry

Because the algorithm caters to nazis.

This is the reason why all corporate media has become the dumpster fire it is (not just social media). They use negative emotion like fear and anger to promote engagement. So all you get as a viewer is stuff that gets you fired up. The quality of journalism is so low now they're fabricating stuff to engage the viewer. Then there's no journalistic accountability when they do get caught with their hand in the cookie jar.

Because these machine learning algorithms only put out what they learn so that they can target the right videos to people. In this case, I think people were searching Youtube for these kinds of videos, so Youtube's algorithm suggested them.

Because outrage and violence generate "engagement"

LORD ALGORYTHM HAS SPOKEN

I was looking for Captain Marvel movie content way back when it came out and accidentally clicked on one of those pitiful right-wing, woman-hating nerdbro videos and my suggestions suddenly became quite heavily peppered with similar horrible content. It feels the same thing doesn't happen with non-conservative content quite so much. I wonder if there's just so much right-wing and liberal content that the algorithm's percentage calculations don't know how to compensate for this sort of political nuance, or is it something more insidious?

Because the videos are popular.

It's probably what people have searched for before. I mean why would anyone watch peaceful protest videos on youtube?

These are meant to rile you up so you hate-watch them so you stay on the site longer, but they have an unintended side-effect of subtly luring people against protesters and into the realm of 'SJW FEMINIST GETS OWNED!!!'.

Did you change your IP address as well?

At any rate, google shows things to people that other people are looking at, as that's how it's algorithm decides what is popular or not. So, the conclusion that can be drawn from this, is that most people that search for videos of protestors, are looking to see them get owned. If you consider internet demographics, this should not be that unusual, really.

It's because people are becoming increasingly violent as political tensions come to a head, and climate collapse drives it onward.

Don't forget that Google suggestions are IP based too. These may not be quite "base" suggestions

It's definitely heavily weighted towards right wing content. Even though it should be less popular. It's like how right wing states always complain about "liberal spending" but then their entire states are subsidized by blue states because their policies are trash. Right wing ideology can't stand on its own without 'training wheels' ie: funding from massively wealthy donors who want to manipulate people's reality.

Because when people start to protest against corporations controlling their lives, Google wants you to see these.

This is actually kinda of disgusting. For fuck sake!

the revolution will not be televised

To be fair, protestors blocking a highway, or the busiest avenue, are annoying the most people so they protest n their place. They should block City Hall, or Congress, or the houses of congressmen. Make the life of those assholes difficult, not the lives of thousands of bystanders.