But free speech has nothing to do with Youtube comments. If you see a video you really want to talk or comment about, you're still free to do it in social media, your site, your blog, instant messaging, etc.I agree but I also disagree cause free speech is important right now.
Youtube comments are not about free speech, but about mostly idiots that say nothing about anything.
If you go to a place that shows free videos in real life (let's imagine a cinema that has free movie sessions), you don't start shouting about how the video is stupid and the person who made it is an idiot in the cinema room. Trying to provoke a flame war and see the reactions. If you do that you end up being "escorted" out of the cinema by security or the police.
What you do is going outside and say that to your friends or anyone who wants to hear it. You share your experience and opinions in the proper places.
Most relevant youtubers these days even have sites, patreons, forums, discord channels, etc, with links to them from the video pages. So people can actually go to those places to express their opinion if they want to.
I really think that Youtube comments were originally made as a good thing, but it evolved into a cesspool. Specially because they always become derails that have nothing to do with the video in question. It always has comments replying to comments and forming a conversation between users that is not relevant to the video posted.