youtube-r10 knock | 2020年12月18日 ← Return to 【企業必見】動画マーケティングの手法と効果について解説! ‹ › Kiev, Ukraine – June 5, 2014: Brand new Apple iPhone 5S with YouTube application service on the screen lying on a desk with headphones. YouTube is the world’s most popular online video-sharing website that founded in February 14, 2005