diff --git a/src/modules/01_manual/MainPage.vue b/src/modules/01_manual/MainPage.vue
index a36ade9d..a668386f 100644
--- a/src/modules/01_manual/MainPage.vue
+++ b/src/modules/01_manual/MainPage.vue
@@ -14,7 +14,7 @@ import mditVideo from "markdown-it-video"
 const md = new MarkdownIt()
 	.use(mditAnchor)
 	.use(mditVideo, {
-		youtube: { width: "50%", height: "auto", autoplay: false },
+		youtube: { width: "70%", height: "auto", autoplay: false },
 	})
 	.use(mditFigureWithPCaption, {
 		figcaption: "alt",