<video controls width="100%" poster="サムネイル画像.jpg">
<!-- 縦画像 -->
<source media="(max-width: 991px)" src="SP用縦動画.mp4" alt="説明" type="video/mp4">
<!-- 横画像 -->
<source src="PC用横動画.mp4" alt="説明" type="video/mp4">
</video>
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