At 6:16 you explain how to select keyframes. One thing I noticed is that there seems to be a difference between lasso/box selecting keyframes and clicking on a keyframe directly.
The former will select just the manipulators/handles while the latter will also select the curve and make the curve appear in the N-menu.
Box selecting a keyframe doesn’t select the curve:

Clicking on a keyframe directly or one of its handles selects the curve (notice the selection is white in this case):

Box selecting the entire curve doesn’t select it if keyframes are part of the selection, I have to explicitly box select just the curve to get to its options:

There also seems to be a difference between the two selections in selected curve’s thickness.
Idk, not really a question, just something I noticed and it confused me for a moment.