duration can be set externally
duration can be set externally

selam/vast-client-js,AltitudeDigital/vast-client-js,sclements/vast-client-js,mpotra/vast-client-js,guardian/vast-client-js,nathschmidt/vast-client-js,tubemogul/vast-client-js,stevennick/vast-client-js,dailymotion/vast-client-js,VidRoll/vast-client-js,SponsorPay/vast-client-js,spodlecki/vast-client-js