How does watching fail videos and memes radicalize people and make them politically polarized? Would it not be obvious to TikTokers that they are being manipula

How does watching fail videos and memes radicalize people and make them politically polarized? Would it not be obvious to TikTokers that they are being manipulated in some way, even subtly? If I want to control narratives and shape opinion, TV is how I would do it. Fox News is basically a propaganda machine, and isn't questioned, because, hey, 'merica.