Strandmokkelsmovies -

Alternatively, the user might have misspelled a word. "Mokkels" doesn't ring a bell in English, so it's likely Dutch. Let me confirm the Dutch meanings. "Strand" is beach, as I thought. "Mokkel" can mean a type of shell or maybe a nickname for someone with freckles. "Movies" is the same in Dutch. So "strandmokkel" might not be a standard term. Maybe they meant "strandmokkel" as in something related to the shore and hidden items, like a hidden movie.