as someone with adhd, these videos are my most preferred method of consuming information. i can read the captions, hear an audio, and be visually entertained. these have helped me learn so much information that i can actually retain. thank you so much!
The hearing vs seeing vs doing teaching ideology as well as ideas about ADHD and autism are touchy and, personally at least, mostly wrong. Everyone is unique. Most people are good at most things. Some people excel in specifics. Some people thrive in different environments. Society, mostly teaching, needs an overhaul imo. The teacher is passionate, thorough, and works at a pace and on a platform for the everyman (who's interested). I believe teachers like this need to be interviewed about teaching and attention and comprehension. It's not ground breaking but some of the basics they have polished well aren't well discussed.
In Boston Massachusetts in the US, the caught-cot merger can be perceived by a non-native speaker as a caught-cot reversal! For example: "I saw a hawley bush on Holly Road!" Also, some Bostonians put a gliding /i/ and /w/ in front /ae/ and /aw/ vowels, respectively, so that cash is heard as /kiash/ and Boston as /Bwawstin/.
From what I understood by watching the video and reading the materials, it is a theoretic concept, that is, languages TEND to pattern congruity. So, these vocalic changes explained here seem to be aiming to have those counterparts. If I misunderstood, I would like to be corrected.