There isn't a law against "dark patterns", and selective/weighted recommendations aren't even generally considered an example of a dark pattern.
The FTC has brought lawsuits against deceptive practices, like tricking people into signing up for something they didn't mean to -- that might be what you're referring to?
But I don't see any deceptive practice here. YouTube favoring more profitable videos is no different from grocery stores putting candy next to you while you wait to check out. Companies are trying to manipulate you into selecting the most profitable thing all the time, that's the norm. But you still get to choose which video to click on, the same as it's your choice whether or not to buy the candy at checkout.
The FTC has brought lawsuits against deceptive practices, like tricking people into signing up for something they didn't mean to -- that might be what you're referring to?
But I don't see any deceptive practice here. YouTube favoring more profitable videos is no different from grocery stores putting candy next to you while you wait to check out. Companies are trying to manipulate you into selecting the most profitable thing all the time, that's the norm. But you still get to choose which video to click on, the same as it's your choice whether or not to buy the candy at checkout.