Please read the sentence right below the one you copy + pasted:
> If you're confused what I mean, check any US mainstream media video with an obvious political slant but pretending to be "objective news" and look at the like/dislike ratio. The system is totally working...except it isn't working out well for the political party that YT would prefer.
In other words: People are disliking obvious political propaganda that YT would prefer that you like.
I still am very confused by what you mean and what you're getting at with this.