commit 1b97f6

2026-02-06 15:10:24 luxmiyu: replace <iframe> with <youtube>

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`misc/test/a.md` ..
@@ 10,11 10,4 @@

	## A Classic

-	<iframe
-	width="560" height="315"
-	src="https://www.youtube.com/embed/dQw4w9WgXcQ"
-	title="YouTube video player" frameborder="0"
-	allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
-	referrerpolicy="strict-origin-when-cross-origin"
-	allowfullscreen
-	></iframe>
+	<youtube>dQw4w9WgXcQ</youtube>