2nd/10_Wiki/Topic_HTML/HTML_Video.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
html-video	HTML Video	Frontend	draft	conceptual		video element <video> HTML5 video embed video video controls		B	0.90	2026-06-23	2026-06-23			html web frontend media video html5 w3schools	https://www.w3schools.com/html/html5_video.asp

HTML Video

🎯 한 줄 통찰 (One-line insight)

The HTML <video> element embeds video natively in a page; multiple <source> children let the browser pick the first format it supports, with controls, autoplay, and muted attributes governing playback. [S1]

🧠 핵심 개념 (Core concepts)

• <video> shows video — it embeds a video player directly, with width and height defining its size. [S1]
• controls adds the UI — the controls attribute adds video controls such as play, pause, and volume. [S1]
• Multiple <source> for fallback — list several <source> elements with different formats; the browser uses the first format it recognizes. Text between the tags is shown if none is supported. [S1]
• autoplay starts on load, but Chromium browsers do not allow autoplay in most cases. [S1]
• muted enables autoplay — adding muted after autoplay lets the video start automatically (muted autoplay is always allowed). [S1]
• Three HTML-standard formats — MP4, WebM, and Ogg. [S1]
• Scriptable — DOM methods, properties, and events let JavaScript load, play, and pause videos and set duration and volume. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Multi-source fallback pattern — <video controls> wrapping ordered <source> elements + fallback text. [S1]
• Sized player pattern — always set width/height to reserve layout space. [S1]
• Muted autoplay pattern — autoplay muted to start playback within browser autoplay policies. [S1]

📖 세부 내용 (Details)

The HTML <video> element — used to show a video on a web page. To show a video, use the <video> element. The controls attribute adds video controls (play, pause, volume). It is good practice to include width and height; if not set, the page may flicker while the video loads. Multiple <source> elements link to different video files — the browser will use the first recognized format. The text between <video> and </video> is shown only in browsers that do not support the element. [S1]

<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>

HTML <video> autoplay — to start a video automatically, use the autoplay attribute. Note: Chromium browsers do not allow autoplay in most cases; however, muted autoplay is always allowed: [S1]

<video width="320" height="240" autoplay>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>

Add muted after autoplay to let the video start playing automatically (but muted): [S1]

<video width="320" height="240" autoplay muted>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>

HTML video formats — there are three supported video formats: MP4, WebM, and Ogg. The MIME (media) type for each: [S1]

File Format	Media Type
MP4	video/mp4
WebM	video/webm
Ogg	video/ogg

MP4 has the broadest browser support. [S1]

HTML video — methods, properties, and events — HTML defines DOM methods, properties, and events for the <video> element. This allows you to load, play, and pause videos, as well as set duration and volume, and includes DOM events that can notify you when a video begins to play, is paused, etc. The source directs to the "HTML Audio/Video DOM Reference" for the full list. [S1]

HTML video tags — [S1]

Tag	Description
<video>	Defines a video or movie
<source>	Defines multiple media resources for media elements, such as <video> and <audio>
<track>	Defines text tracks in media players

🛠️ 적용 사례 (Applied in summary)

The examples above are the canonical applied uses: a controlled player offering MP4 with an Ogg fallback, an autoplay variant, and a muted-autoplay variant that complies with modern browser autoplay policies. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Standard video player with fallback (HTML):

<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>

Muted autoplay (HTML):

<video width="320" height="240" autoplay muted>
  <source src="movie.mp4" type="video/mp4">
</video>

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source. The notable real-world constraint is browser autoplay policy: autoplay alone is blocked by Chromium browsers in most cases, so muted is required for reliable autoplay. [S1]

✅ 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: 0.90
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: HTML Tutorial
• 관련 개념: HTML Audio, HTML Media, HTML Plug-ins, HTML5
• 참조 맥락: Referenced when embedding playable video with cross-browser format fallbacks.

📚 출처 (Sources)

• [S1] W3Schools — HTML Video — https://www.w3schools.com/html/html5_video.asp

📝 변경 이력 (Change history)

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