2nd/10_Wiki/Topic_CSS/CSS_RWD_Videos.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
css-rwd-videos	CSS RWD Videos	Frontend	draft	conceptual		responsive video max-width video RWD videos video scaling fluid video		B	0.87	2026-06-23	2026-06-23			css web frontend w3schools responsive video	https://www.w3schools.com/css/css_rwd_videos.asp

CSS RWD Videos

🎯 한 줄 통찰 (One-line insight)

A video is made responsive the same way an image is — width: 100% scales it up and down with its container, while max-width: 100% (with height: auto) scales it down without ever enlarging it beyond its original size. [S1]

🧠 핵심 개념 (Core concepts)

• width: 100% — set on the video, makes it responsive and scale up and down with the container. [S1]
• max-width: 100% — scales the video down if needed but never up to be larger than its original size; a better solution in many cases. [S1]
• height: auto — paired with either width rule so the video keeps its proportions. [S1]
• Fills available space — a video added with this styling will be resized to always take up all the available space. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Fluid video — video { max-width: 100%; height: auto; } is the safe default, mirroring the responsive-image pattern. [S1]

📖 세부 내용 (Details)

Using The width Property — If the width property is set to 100%, the video player will be responsive and scale up and down: [S1]

video {
  width: 100%;
  height: auto;
}

Notice that in the example above, the video player can be scaled up to be larger than its original size. A better solution, in many cases, will be to use the max-width property instead. [S1]

Using The max-width Property — If the max-width property is set to 100%, the video player will scale down if it has to, but never scale up to be larger than its original size: [S1]

video {
  max-width: 100%;
  height: auto;
}

Add a Video to The Example Web Page — Add a video to the example web page we used in the previous chapter. The video will be resized to always take up all the available space, using the same max-width styling approach. The Example box for this section presents only a "Try it Yourself" link with no additional inline code beyond the styling above — Not found in source. [S1]

🛠️ 적용 사례 (Applied in summary)

The video examples apply the responsive styling to the example web page from the previous chapter so the video always takes up all available space. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Fluid video, no upscaling (language: CSS):

video {
  max-width: 100%;
  height: auto;
}

Scale-with-container video (language: CSS):

video {
  width: 100%;
  height: auto;
}

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

• width: 100% vs max-width: 100% — width: 100% scales the video both up and down (can exceed original size); max-width: 100% scales down only and never beyond the original size — described as a better solution in many cases. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source.

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.87
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: CSS Tutorial
• 관련 개념: CSS RWD Images, CSS RWD Media Queries, CSS RWD Viewport
• 참조 맥락: Applies the same fluid-media technique as responsive images to the <video> element.

📚 출처 (Sources)

• [S1] W3Schools — CSS RWD Videos — https://www.w3schools.com/css/css_rwd_videos.asp

📝 변경 이력 (Change history)

• 2026-06-23: Initial draft synthesized from the W3Schools "CSS RWD Videos" page (Astra wiki-curation, P-Reinforce v3.1 format).