Language . . . an interesting, complicated topic. I watched the first-posted video. Parasite is a possible metaphor. Personally, I’d say language is both a useful tool and a possible weapon / potential trap.
As @Divergent suggests, the mind easily gets caught up in our constant inner dialogue, which consists of words. Those words, of course, depend on the particular language we speak. And the inner dialogue is (or at least can be) a distraction from direct experience.
The idea that language conditions and restricts our ability to perceive things has been around, in explicitly that formulation, since at least the 20th century. I’ve never been sure to what degree that’s true, but there’s probably something to it, though less than its strongest proponents might believe. If two people look at something that’s blue, whether or not they have a word for the color, can we really conclude they’re not both actually seeing the same thing? Maybe that’s not the claim; I don’t know.
What’s more interesting, to me, is the fact that two people from entirely different cultures, but who do have a word for blue in their respective languages, will look at the same blue thing and almost invariably agree the thing is blue. To my mind, that proves reality isn’t purely subjective, purely a matter of interpretation, or totally constrained by words.
Also, a lot goes into communication and perception besides language and symbols–such as gut feelings, intuitions, body language, pheromones, and heaven knows what else.
If I understood it correctly, the idea behind the book written by the guy in that first video is a very ancient one. It’s the idea behind certain forms of meditation developed millennia ago. That doesn’t mean his presentation of the idea isn’t useful, especially for the modern mind, and I agree with his basic point even if I wouldn’t use the analogy of a parasite.
@Bill10558 makes a good point too: “‘What IS thought?’ What triggers recognition?" That’s a threshold question that people can’t agree on how to answer. It’s essentially the same question as “What is consciousness?” That question, too, was exhaustively explored millennia ago, although so-called highly educated people in the modern world may ignore the fact.