Some reacted with anger and confusion, while others looked on approvingly, even offering their congratulations.
A 12-year-old girl, in a white wedding dress and veil, stands beside a man who looks like her grandfather. They are getting their wedding pictures taken by the sea.
Passers-by question him and the photographer, one accusing the groom of being a “criminal”.
The groom replies: “This is none of your business. I got permission from her parents."
The bride and groom are actors, hired by the KAFA - “enough” in Arabic - Violence & Exploitation campaign in Lebanon.
The video has gathered over 1.7 million views and shines a spotlight on the dire plight of thousands of young girls in Lebanon, Syria and around the world who are forced into marriage with much older men every day.
Nearly 15 million girls - some as young as eight or nine - are forced into marriage each year. The United Nations Population Fund (UNFPA) estimates that an additional 1.2 billion girls will be forced into child marriage by 2050.
The Lebanese National Commission for Women’s Affairs introduced a bill into Parliament in 2015 that would require that a civil judge, and not just a religious tribunal, to approve all child marriages. The bill has yet to be addressed.
Maya Ammar, KAFA’s communications coordinator, said: “The scene [video] was supposed to seem shocking because the practice itself is shocking.”