1:41 - by "You cant move two different directions at once" i mean you
cant have two keyframes overlapping eachother, one will replace the
other, that's why you drag the scrubber.
1:50 - i did not explain what a scrubber is, the best example is the
youtube video progress bar, which is a scrubber
3:51 - did not explain CFrame, CFrame or Coordinate Frame is simply just
the position, direction and coordinates of a part, rig, camera or
anything inside studio at a given point