Paul Day has many videos on YouTube, including some great underwater video. See https://www.youtube.com/channel/UCImZm-kyHsKsJRfmlHEXm8w , incl. underwater footage at Point Riley at https://www.youtube.com/watch?v=fP0lCqtQ9A4 and https://www.youtube.com/watch?v=wCY_2FY9A74&list=PLcPiwIlhaojQi7RN2QDIZoUqZ96murU0Q .