diff --git a/src/main/java/com/devpick/domain/content/entity/Content.java b/src/main/java/com/devpick/domain/content/entity/Content.java
index 9512563..ab4ccb2 100644
--- a/src/main/java/com/devpick/domain/content/entity/Content.java
+++ b/src/main/java/com/devpick/domain/content/entity/Content.java
@@ -106,6 +106,10 @@ public class Content extends BaseTimeEntity {
     @Convert(converter = StackOverflowAnswerListConverter.class)
     private List<StackOverflowAnswerDto> topAnswers;
 
+    // YouTube 전용 필드 저장 (JSON 문자열: videoId, channelName, duration, viewCount)
+    @Column(name = "extra", columnDefinition = "jsonb")
+    private String extra;
+
     @OneToMany(mappedBy = "content", cascade = CascadeType.ALL, orphanRemoval = true)
     @Builder.Default
     private List<ContentTag> contentTags = new ArrayList<>();
diff --git a/src/main/resources/data.sql b/src/main/resources/data.sql
index 74cec45..25c0798 100644
--- a/src/main/resources/data.sql
+++ b/src/main/resources/data.sql
@@ -75,3 +75,8 @@ WHERE NOT EXISTS (SELECT 1 FROM content_sources WHERE name = 'Medium_watcha');
 INSERT INTO content_sources (id, name, url, collect_method, is_active, created_at)
 SELECT gen_random_uuid(), 'Kakao_Tech', 'https://tech.kakao.com/feed/', 'rss_crawl', true, NOW()
 WHERE NOT EXISTS (SELECT 1 FROM content_sources WHERE name = 'Kakao_Tech');
+
+-- DP-413: YouTube 수집 소스 추가 (AI 레포가 YouTube Data API로 수집 후 POST /internal/contents 전달)
+INSERT INTO content_sources (id, name, url, collect_method, is_active, created_at)
+SELECT gen_random_uuid(), 'YouTube', 'https://www.youtube.com', 'api', true, NOW()
+WHERE NOT EXISTS (SELECT 1 FROM content_sources WHERE name = 'YouTube');
diff --git a/src/test/java/com/devpick/domain/content/entity/ContentTest.java b/src/test/java/com/devpick/domain/content/entity/ContentTest.java
index 1dc7440..f5b6bf0 100644
--- a/src/test/java/com/devpick/domain/content/entity/ContentTest.java
+++ b/src/test/java/com/devpick/domain/content/entity/ContentTest.java
@@ -58,4 +58,38 @@ void builder_withFields() {
         assertThat(content.getIsOriginalVisible()).isTrue();
         assertThat(content.getLicenseType()).isEqualTo("CC BY-SA 4.0");
     }
+
+    @Test
+    @DisplayName("extra 필드 미설정 시 null — 기존 콘텐츠 조회에 영향 없음")
+    void builder_extraDefaultsToNull() {
+        ContentSource source = ContentSource.builder()
+                .name("Velog").url("https://v2.velog.io/graphql").collectMethod("graphql").build();
+
+        Content content = Content.builder()
+                .source(source)
+                .title("Kotlin 코루틴")
+                .canonicalUrl("https://velog.io/@user/kotlin")
+                .build();
+
+        assertThat(content.getExtra()).isNull();
+    }
+
+    @Test
+    @DisplayName("extra 필드에 YouTube JSON 문자열을 저장할 수 있다")
+    void builder_extraWithYouTubeJson() {
+        ContentSource source = ContentSource.builder()
+                .name("YouTube").url("https://www.youtube.com").collectMethod("api").build();
+        String youtubeExtra = "{\"videoId\":\"dQw4w9WgXcQ\",\"channelName\":\"우아한Tech\",\"duration\":312,\"viewCount\":15000}";
+
+        Content content = Content.builder()
+                .source(source)
+                .title("우아한Tech 스프링 강의")
+                .canonicalUrl("https://www.youtube.com/watch?v=dQw4w9WgXcQ")
+                .extra(youtubeExtra)
+                .build();
+
+        assertThat(content.getExtra()).isEqualTo(youtubeExtra);
+        assertThat(content.getExtra()).contains("videoId");
+        assertThat(content.getExtra()).contains("channelName");
+    }
 }