GISTIL
ログイン

現場ノート計測済みライブラリから

計測した動画から分かったこと

私たちはYouTube動画を、尺のどれだけが実際に価値を届けているかで評価します。これは、数がそろって初めて見えてきたパターンです。

水増しの中央値 36% 役立つ部分が始まる中央値 0:47 再計算済み 19 Oct 2026

  1. 記事2026/8/265分

    How to find advanced material when everything YouTube recommends is beginner-level

    Search tricks and channel patterns that reliably surface advanced material, and why the ordinary search results skew introductory in the first place.

  2. 記事2026/8/265分

    How to evaluate a YouTube channel before you subscribe

    Three channel-level signals that predict whether a creator is worth following, separate from whether any single video of theirs was good.

  3. データレポート2026/8/265分

    Which subjects are worth your time: measured value across twenty subjects

    Science scores highest of twenty measured subjects at 66.9; travel lowest at 38.4. The same subjects also carry the least padding and the most honest titles.

  4. データレポート2026/8/265分

    How long is a lesson, really: runtime measured across twenty subjects

    Median runtime runs from 18:16 in history to 9:30 in productivity, nearly two to one. It has almost no relationship to which subjects score highest on value.

  5. データレポート2026/8/265分

    Do YouTube titles tell the truth? Honesty measured across twenty subjects

    Average title honesty is 81 out of 100, from 87 in science down to 73 in travel. The same subjects that oversell titles also carry the most padding.

  6. データレポート2026/8/257分

    The useful part of the median measured video starts at 1:02

    Across the videos we have measured the useful part starts at 1:02, and one in ten makes you wait past 3:47. Here is how that splits across twenty subjects.

  7. データレポート2026/8/257分

    We measured the padding again, on a larger library. The number has not moved.

    A second padding census, on a larger set of measured videos. The median is still 40%, the set has grown by three quarters, and the distribution barely moved.

  8. データレポート2026/8/257分

    We measured twenty subjects. Three percent of the videos were advanced.

    Three percent of the videos we measured were pitched above intermediate. Here is which subjects have none at all, and the one signal that finds the rest.

  9. データレポート2026/8/257分

    One in five measured videos was not worth the time it asked for

    One in five measured videos was not worth its runtime. The share runs from 5% in science to 64% in travel, and the title predicts it before you click.

  10. 記事2026/8/195分

    Why YouTube videos feel three times longer than they need to be

    We measured the padding across a library of explanatory videos. It is not the sponsor segment, and it is not where most people think it is.

  11. 記事2026/8/185分

    What "value density" means, and how we measure it

    The three numbers Gistil puts on a video, what each one is actually claiming, and the places where they do not apply.

  12. データレポート2026/8/176分

    We measured YouTube across fifteen categories. This is how much of it was filler.

    A padding census across fifteen categories: the median video is 40% structure, and the long ones are the least padded, not the most.