I know plenty of people that do that, and if it worked for me, I would do it too. 🙂
“I have enough trouble getting it at regular speed, because I will wander on things they say, pondering it in more depth mentally. Then I realize what I’ve done & I have to rewind & listen again.”
Well, you can always do what I do when watching a show like Billions, where they’re talking a zillion words a minute and the stuff they’re saying is like Greek to me (I’m into pc/geek... just not the financial/investment/stock market side of it). Just do the opposite and slow the video down. It helps.