If you do not have time to watch the video, I summarized two random statements the woman says:
“oh o-sashimi and on top already soy-sauce and wasabi… don`t have to add anything”
“…underneath is sushi-rice – should eat together”
Following Video was made in September 2020 in Japan. The woman in the beginning is our grandmother. The main protagonist in the video is Mai. The village is called Mitsu in Aminocho, Kyotango. The empty shell is from an Awabi. It probably got eaten by an octopus.