Yep, people will find a video based on a search, and will click on a video based on what the thumbnail looks like, and if the title appeals to them, not on what is said in the video, but what is said in the video technically helps. It's also important not to have much swearing withing the first 20 seconds of a video, as mentioned by Creator Insider last year. What you say helps in terms of data... but what you say in the video should relate to the topic of the video anyway. If you're doing a video review on the Mandelorian Season 2, there's a very good chance you'll be saying those words anyway, so it's nothing to really think about, it just happens organically anyway. But I don't think the amount of times you say something "helps" in making something rank "better", as you always say andrew, it provides data to help YouTube understand what the video is about. Just like closed captioning helps with providing data.
How much data is provides and how much it helps in it being served is probably irrelevant when people generally judge the quality of a video based on the thumbnail and title and description (and they only see about 2 lines of description before clicking) you can stuff a video full of verbal keywords, but if the title isn't interesting and the thumbnail stinks, people still aren't going to click, which will drop the ranking long term.