Alphabet‘s (NASDAQ: GOOG) YouTube remains the undisputed leader in the realm of clip culture, but it appears to be on the wrong side of the velvet rope when trendiness is the bouncer. The vast majority of the videos making news these days — including horrific but brutally relevant live broadcasts — are taking place on Facebook (NASDAQ: FB) and to a lesser extent Twitter‘s (NYSE: TWTR) Periscope.