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URL：https://1.bp.blogspot.com/-CTveOJLlJyY/UqLmCJk1MII/AAAAAAAANsc/dOy-4jP-01Q/s9600/online-video-youtube.jpg 掲載元：https://www.digitalinformationworld.com/2013/12/why-videos-drive-sales-youtube-in-2014-infographic.html
