A few years ago I was participating in an Excel PivotTable contest, where the goal was to make the best PivotTable you can under 5 minutes. I don’t know how good was mine, but in this video is a bunch of interesting stuff going on. My goal was to do as much as I can, and I was training my speed for a few days to fit in 5 minutes with this “PivotTable essence”.
If it is too fast, then change YouTube speed settings. That is my favorite thing to readjust when watching educational videos.