Added to the introductory video narrative on YouTube:
The introductory video narrative on YouTube clarified by including which keyboard keys [e.g. "option" "shift" "control" "space bar" or "command"] are being used when track elements are shown being inserted, deleted, selected, moved as a group and managed. The tools icons alone might not the only functions used to accomplish a task in handling track elements and designing a layout.
All recently produced videos now include visualizations of the keyboard keys used.
Pressed keys will be indicated in the recordig for future videos/tutorials!