Take context from the input text and decide on the accurate relationship between 'gamers' and 'video game' from the options provided.
Options: director/manager, product/material produced, stock exchange, business division

SAN FRANCISCO, Sept 25 Video gamers who live-stream their matches online and the throngs of fans who tune in daily to watch them swarmed a first-of-its kind convention in San Francisco on Friday, as interest swells in the medium of online video game broadcasting.
product/material produced