テスト

<div class="embed-responsive embed-responsive-16by9"><iframe width="640" height="360" style="max-width: 100%;max-height: 100%; border:none;" src="https://www.asajima-gumi.com/channel/AsajimaY/videoEmbed/22/%E3%83%86%E3%82%B9%E3%83%88" frameborder="0" allowfullscreen="allowfullscreen" allow="autoplay" scrolling="no" videoLengthInSeconds="9">iFrame is not supported!</iframe></div>

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