YouTube and other social media platforms are engaged in an exploitive bait and switch, which happens to collide with the speech issues. However, the core issue is one where speech is just the game ball.
Social Media platforms tell creators and their fans that they will act as "platforms" for the creator's free expression -- provided it's in line with the "Terms of Service." However, it the "Terms of Service" is a bugaboo. Social Media platforms are effectively manipulating the speech of their creators to tell their own ideological message, using censorship, the threat of demonetization, the threat of de-platforming, and the manipulative denial of viral spread -- in uncountable cases, with no reasonable connection to their terms of service. It would be one thing, if this were always actually to "preserve the value of their platform for advertisers" or some such, but the record bears out in innumerable instances that many of their actions are the grinding of an ideological axe by lower level company functionaries.
This is a bait and switch. With one hand, the platforms are saying, "We will serve as your conduit," then with the other hand, they are saying, "You will send the ideological message that we want you to say, or else!" Many will say that this is their right as a private company. No private company has the right to say they will do one thing, but then dishonestly do the opposite through murky deception and threats.
The record of illogical, nonsensical, and weird contortions "platforms" go through to hide ideological manipulation is legion. If a full accounting were entered into the record in a court of law, and if discovery to uncover collusion in such activities were carried out, I predict that it wouldn't go well for Big Tech. They know this, are afraid of this, and this explains their behavior to a T.