This video today is about taking your stitches back one at a time. This is when you’ve made a mistake on the round or row you’ve just knitted or the one below so you just need to take one or two rounds/rows out.
I don’t do this when I had to take out the rib rounds out, I just took my needles and pulled back. However this is the technique I use, probably every other time I knit! I knit while doing something else, like watching TV or chatting with peeps and so mistakes do happen which I usually see on the next round/row and so I use this technique to correct those hiccups.