The first page of the waiver package has a box you must initial to signify that you have watched the Blue Grotto safety and orientation video. Do so now.
Next, watch the safety and orientation video for the cave itself.
The statement you sign before you dive the cave includes an acknowledgement that you have, in fact, watched both videos in their entirety. Your guide will be relying on the fact you have done so and are completely familiar with their contents.