<sod >Campaigners supported by the Hotel Association of New York City, a union representing hotel workers, posted a YouTube video linking Airbnb properties as a public security threat.< eod>< sod > Campaigners supported by the Hotel Association of New York City, a union representing hotel workers, posted a YouTube video suggesting that Airbnb properties presented a public security threat The 30-second video launches an attack on the startup, citing terrorists using the home-rental service as a "risk".< eod>