video-manager: honour VideoEvents.VISIBILITY event (#11787)
video-manager: honour VideoEvents.VISIBILITY event (#11787)


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ridgewell/amphtml,techhtml/amphtml,jmadler/amphtml,yieldmo/amphtml,adup-tech/amphtml,comScore/amphtml,powdercloud/amphtml,engtat/amphtml,Gregable/amphtml,kixer-com/amphtml,prateekbh/amphtml,sharethrough/amphtml,aghassemi/amphtml,mhc-gh/amphtml,yieldmo/amphtml,bpaduch/amphtml,rajkumarsrk/amphtml,cory-work/amphtml,chaveznvg/amphtml,nexxtv/amphtml,danielrozenberg/amphtml,chaveznvg/amphtml,powdercloud/amphtml,media-net/amphtml,powdercloud/amphtml,yieldbot/amphtml,shawnbuso/amphtml,laterpay/amphtml,rsimha-amp/amphtml,shawnbuso/amphtml,dotandads/amphtml,kixer-com/amphtml,media-net/amphtml,rajkumarsrk/amphtml,ampproject/amphtml,gumgum/amphtml,erwinmombay/amphtml,sharethrough/amphtml,zhangsu/amphtml,ADITION/amphtml,zhangsu/amphtml,nexxtv/amphtml,donttrustthisbot/amphtml,src-code/amphtml,voyagegroup/amphtml,zhouyx/amphtml,gumgum/amphtml,rajkumarsrk/amphtml,yieldbot/amphtml,pedjoni8/amphtml,yandex-pcode/amphtml,alanorozco/amphtml,koshka/amphtml,kamtschatka/amphtml,jmadler/amphtml,cory-work/amphtml,gumgum/amphtml,donttrustthisbot/amphtml,bpaduch/amphtml,cory-work/amphtml,zhangsu/amphtml,jpettitt/amphtml,widespace-os/amphtml,BenDz/amphtml,kamtschatka/amphtml,smartadserver/amphtml,yieldbot/amphtml,lannka/amphtml,clawr/amphtml,mhc-gh/amphtml,jpettitt/amphtml,sebastianbenz/amphtml,comScore/amphtml,media-net/amphtml,dotandads/amphtml,pedjoni8/amphtml,shawnbuso/amphtml,sharethrough/amphtml,widespace-os/amphtml,yandex-pcode/amphtml,luciancrasovan/amphtml,clawr/amphtml,cory-work/amphtml,nexxtv/amphtml,voyagegroup/amphtml,danielrozenberg/amphtml,koshka/amphtml,camelburrito/amphtml