{
  "title": "Sponsor segment length and placement in 100 English YouTube videos",
  "publisher": "SponsorSkip",
  "published": "2026-10-08",
  "segmentSource": "SponsorBlock public API (sponsor.ajay.app), categories sponsor and selfpromo, action type skip, segments with non-negative votes, fetched 2026-09-19. Segment data by SponsorBlock contributors; this file contains only SponsorSkip's aggregate statistics.",
  "selection": "Channel list and order fixed before collection; at most 4 videos per channel; 5 to 30 minute videos with original English captions that already had SponsorBlock sponsor or self-promotion segments. Because every video was required to have a segment, the sample cannot tell how many YouTube videos contain sponsors.",
  "videos": 100,
  "channels": 26,
  "totalVideoHours": 30.02,
  "medianVideoMinutes": 18.0,
  "videosWithSponsorSegment": 82,
  "sponsorSegments": {
    "count": 105,
    "medianSeconds": 64.0,
    "meanSeconds": 63.5,
    "p25Seconds": 23.6,
    "p75Seconds": 94.4,
    "p90Seconds": 114.4,
    "minSeconds": 1.7,
    "maxSeconds": 143.7,
    "under15Seconds": 21
  },
  "lengthBuckets": {
    "under 30 s": 29,
    "30 to 59 s": 19,
    "60 to 89 s": 28,
    "90 to 119 s": 22,
    "120 s or more": 7
  },
  "perSponsoredVideo": {
    "medianSponsorSeconds": 80.5,
    "meanSponsorSeconds": 81.3,
    "medianShareOfRuntimePercent": 7.89,
    "exactlyOneSponsorSegment": 63
  },
  "shareOfAllRuntimePercent": {
    "sponsor": 6.17,
    "sponsorAndSelfPromotion": 7.68
  },
  "placementByStart": {
    "openingFirst10Percent": 18,
    "middle": 35,
    "closingLast20Percent": 52
  },
  "medianSponsorSecondsByVideoLength": {
    "under 10 min": 62.3,
    "10 to 20 min": 65.6,
    "20 to 30 min": 70.6
  },
  "selfPromotion": {
    "segments": 53,
    "videos": 38,
    "medianSeconds": 16.2
  },
  "byChannel": [
    {
      "channel": "Adam Ragusea",
      "videos": 4,
      "sponsorSegments": 5,
      "opening": 1,
      "middle": 3,
      "closing": 1
    },
    {
      "channel": "CGP Grey",
      "videos": 1,
      "sponsorSegments": 0,
      "opening": 0,
      "middle": 0,
      "closing": 0
    },
    {
      "channel": "ChrisFix",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 2,
      "middle": 1,
      "closing": 1
    },
    {
      "channel": "Donut",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 4,
      "closing": 0
    },
    {
      "channel": "ElectroBOOM",
      "videos": 4,
      "sponsorSegments": 8,
      "opening": 1,
      "middle": 5,
      "closing": 2
    },
    {
      "channel": "Ethan Chlebowski",
      "videos": 4,
      "sponsorSegments": 3,
      "opening": 1,
      "middle": 2,
      "closing": 0
    },
    {
      "channel": "Gamers Nexus",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 1,
      "middle": 3,
      "closing": 0
    },
    {
      "channel": "Half as Interesting",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 0,
      "closing": 4
    },
    {
      "channel": "Hardware Unboxed",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 4,
      "middle": 0,
      "closing": 0
    },
    {
      "channel": "How To Cook That",
      "videos": 4,
      "sponsorSegments": 0,
      "opening": 0,
      "middle": 0,
      "closing": 0
    },
    {
      "channel": "JayzTwoCents",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 4,
      "middle": 0,
      "closing": 0
    },
    {
      "channel": "Linus Tech Tips",
      "videos": 4,
      "sponsorSegments": 10,
      "opening": 2,
      "middle": 3,
      "closing": 5
    },
    {
      "channel": "Mark Rober",
      "videos": 4,
      "sponsorSegments": 0,
      "opening": 0,
      "middle": 0,
      "closing": 0
    },
    {
      "channel": "Marques Brownlee",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 0,
      "closing": 4
    },
    {
      "channel": "Mrwhosetheboss",
      "videos": 4,
      "sponsorSegments": 7,
      "opening": 0,
      "middle": 3,
      "closing": 4
    },
    {
      "channel": "Numberphile",
      "videos": 4,
      "sponsorSegments": 3,
      "opening": 0,
      "middle": 0,
      "closing": 3
    },
    {
      "channel": "Practical Engineering",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 0,
      "closing": 4
    },
    {
      "channel": "RealLifeLore",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 0,
      "closing": 4
    },
    {
      "channel": "SmarterEveryDay",
      "videos": 4,
      "sponsorSegments": 2,
      "opening": 0,
      "middle": 1,
      "closing": 1
    },
    {
      "channel": "Steve Mould",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 2,
      "closing": 2
    },
    {
      "channel": "Stuff Made Here",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 0,
      "closing": 4
    },
    {
      "channel": "Technology Connections",
      "videos": 4,
      "sponsorSegments": 0,
      "opening": 0,
      "middle": 0,
      "closing": 0
    },
    {
      "channel": "The B1M",
      "videos": 4,
      "sponsorSegments": 8,
      "opening": 0,
      "middle": 4,
      "closing": 4
    },
    {
      "channel": "Tom Scott",
      "videos": 3,
      "sponsorSegments": 6,
      "opening": 1,
      "middle": 2,
      "closing": 3
    },
    {
      "channel": "Veritasium",
      "videos": 4,
      "sponsorSegments": 5,
      "opening": 1,
      "middle": 2,
      "closing": 2
    },
    {
      "channel": "Wendover Productions",
      "videos": 4,
      "sponsorSegments": 4,
      "opening": 0,
      "middle": 0,
      "closing": 4
    }
  ],
  "limits": [
    "Selected popular English-language channels, mostly technology, science and education; not a random sample of YouTube.",
    "Boundaries are community submissions and can be slightly early or late.",
    "Placement is strongly channel-specific: a few channels contribute several videos each.",
    "Videos were 5 to 30 minutes long; podcasts and very long videos are not represented."
  ]
}