よくある ご質問

SayItVidは誰でも100%無料で利用できます。未登録のゲストでも1日10回まで検索可能です。無料アカウントを作成すると、1日50回の検索、単語リストの保存、開発者向けAPIキーが利用可能になります。

はい！複合語、慣用句（例: "at the end of the day", "bite the bullet"）、日常会話フレーズを検索できます。フレーズ全体が一連の流れで発音されている動画シーンを的確に再生します。

Our video database incorporates speakers with diverse accents from around the world, including General American, British (Received Pronunciation, London, Northern), Australian, Canadian, Irish, Scottish, and international English. This diversity helps you understand native speech across international contexts.

Yes! The interactive video player includes speed controls (such as 0.75x and 0.5x speed) so you can listen carefully to fast or subtle phonemes, as well as a one-click replay button to loop the exact timestamp until you have mastered the pronunciation.

Yes. When the video player is active, you can use convenient keyboard navigation: press Space to play/pause, Left Arrow / Right Arrow to seek backward or forward, and quick navigation buttons to skip to the next or previous video hit.

Every video segment is indexed using high-resolution, time-aligned subtitle transcripts. Our indexing pipeline pinpoints the exact start and end timestamps down to the fraction of a second, with the searched word prominently highlighted in the synchronized caption box below the video.

SayItVid is an ideal resource for English educators and language learners. Teachers use it in class to demonstrate authentic speech, vowel reductions, and contextual vocabulary. Students preparing for IELTS Speaking, TOEFL, Cambridge exams, or public presentations use it for shadow speaking, accent training, and learning colloquial usage in natural contexts.

Our search index contains over 450,000 real video clips sourced from educational lectures, interviews, science documentaries, tech presentations, and conversations. We continuously expand the index with high-quality English channels covering academic, business, and everyday vocabulary.

SayItVid operates in strict compliance with the YouTube API Terms of Service, European GDPR, and international copyright principles. We do not download, store, or re-host any copyrighted video or audio files on our servers. All videos stream directly from YouTube through official, privacy-respecting embedded player APIs (youtube-nocookie.com), preserving creator views and metrics.

Yes, SayItVid is fully responsive and optimized for smartphones, tablets, laptops, and wide desktop displays. The layout adapts seamlessly with touch-friendly player controls, instant search, and dark mode support.

はい！Claude Desktop、Cursor、Opencodeなどで利用可能なMCPサーバーを提供しています。AIが動画の再生箇所や発音記号を直接参照できます。詳細は /mcp をご覧ください。

Word Playlists let you organize vocabulary into custom study decks (such as "IELTS Speaking", "Business English", or "Tricky Vowels"). Click the list icon or "Save Word" on any video player to add words to your collection. Playlists can be kept private for personal study or set to public with a shareable link at /list/[slug] to share with classmates or students.

シャドーイングは、ネイティブの発音を聞きながら即座に復唱してリズムや抑揚を体得する効果的なトレーニングです。SayItVidではマイクに向かって発声するだけで、単語ごとの発音精度を0〜100%でリアルタイムに自動採点します。

いいえ。プライバシーは完全に保護されています。音声認識および発音採点はブラウザ内のWeb Audio APIを利用して端末内で完結して実行されます。音声データが外部サーバーに送信されることは一切ありません。

当サイトの音節カウンター（/syllable-counter）は入力テキストを即座に解析し、音節の区切りや強勢の位置を表示し、Flesch可読性スコアを算出して俳句の5-7-5の音数を自動チェックします。

単語比較機能（/compare）を使えば、混同しやすい単語（例: "accept vs except"）や母音のミニマルペア（例: "ship vs sheep"）を、動画とIPA発音記号を用いて並べて比較できます。

Accent Battles (/accents) let you explore how words differ across English dialects, specifically American (US), British (UK), and Australian (AUS) English. You can watch authentic native speakers from each region pronouncing the same word side-by-side and participate in live community voting polls to vote on the pronunciation you prefer or use most.

Yes! SayItVid supports responsive embeddable widgets. You can generate an <iframe> embed code for any public word playlist or search result by clicking "Embed" in your saved lists (/saved) or via /embed/[slug]. The embed is mobile-responsive, respects dark and light themes, and integrates smoothly into WordPress, Ghost, Webflow, Notion, Canvas, and Moodle.

はい！SayItVidにはManifest V3準拠の公式Chrome拡張機能があります。ウェブページ上の任意の英単語を選択するだけで、IPA発音記号やYouTube動画クリップを即座に表示できます。

はい、開発者の方は公開REST API（/api/v1）を通じて動画クリップ、タイムスタンプ、IPA発音データを自社アプリに組み込むことができます。詳細は /api-docs をご覧ください。