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SponsorSkip, SponsorBlock, Skipper AI and SkipVid: sponsor detection, transcript tools and skip controls
Compare featuresSponsorSkipAI + transcript toolsSponsorBlockCommunity timestampsSkipper AICommunity + GeminiSkipVidSkipping + video tools
Sponsor detectionAI reads the transcriptViewer-submitted timestampsSponsorBlock + YouTube GeminiSponsorBlock data
Skip boundariesAI checks start + end in contextEarly starts + late ends found in our auditCommunity or Gemini timestampsSponsorBlock timestamps
Videos not marked yetAnalyze available captionsNeeds a viewer submissionAI needs an eligible YouTube accountNeeds SponsorBlock coverage
Transcript searchSearch + click to jumpNot listedNot listedKeyword search + jump
Sponsor textHighlighted in the transcriptTimeline segmentsTimeline markersNot listed
Undo a skipOne click. Remembered locally.Unskip + voteNot listedNot listed

Provider sources are linked above. “Not listed” means not described in those sources. See our timestamp audit. Updated September 15, 2026.

Detection research · test of September 15, 2026

Measured,
not promised.

20 YouTube videos SponsorSkip had never seen, from 20 channels, 6 h 03 min of footage. Every second of sponsor time was located and frozen before the detector ran, then scored against what SponsorSkip skips on its own.

95.55%of known sponsor time skipped automatically
99.99%precision on scored time
0.08 sof editorial content skipped by mistake, across all 20 videos
13 / 15scorable sponsor reads skipped automatically
Where the sponsor time went960.9 s of sponsor reads in the reference
Editorial time skipped by mistake
0.08 s of 20,017 s
Skips inside uncertain edge zones
62.6 s, scored neither right nor wrong
Uncertain reference time excluded
154.5 s at the first and last caption line of each sponsor read
Every sponsored video, one barShare of each video's sponsor time skipped automatically
  1. I Struck A Match With a Bullet (380,117 fram…100%I Struck A Match With a Bullet (380,117 frames per second SlowMo) - Smarter Every Day 294
    142.3 s of 142.3 s skipped
  2. The Wild Story of the Teton Dam Failure100%The Wild Story of the Teton Dam Failure
    129.8 s of 129.8 s skipped
  3. New shape discovered!100%New shape discovered!
    117.1 s of 117.1 s skipped
  4. Can You Turn a Rainbow Back into White Light?100%Can You Turn a Rainbow Back into White Light?
    99.0 s of 99.0 s skipped
  5. The last bite I'd take before the end100%The last bite I'd take before the end
    62.6 s of 62.6 s skipped, 0.08 s too much
  6. MORE Bad News for AI (and GOOD news for us!)100%MORE Bad News for AI (and GOOD news for us!)
    61.0 s of 61.0 s skipped
  7. What is Dodge Even Doing?100%What is Dodge Even Doing?
    39.7 s of 39.7 s skipped
  8. MSI Trades Security for RGB100%MSI Trades Security for RGB
    26.8 s of 26.8 s skipped
  9. Solving problems by adding a dimension100%Solving problems by adding a dimension
    13.2 s of 13.2 s skipped
  10. This mechanism shrinks when pulled99.7%This mechanism shrinks when pulled
    114.6 s of 114.9 s skipped
  11. AMD Tried To Block This Review, But We Got T…99.6%AMD Tried To Block This Review, But We Got The RX 9050 Anyway!
    59.3 s of 59.6 s skipped
  12. The Steam Frame Changes Everything - Full Re…74.1% *The Steam Frame Changes Everything - Full Review
    52.6 s of 71.0 s skipped
    Two passages were held for manual confirmation. Held time counts as missed.
  13. We bought the most Extreme Gaming Tech!0.0% *We bought the most Extreme Gaming Tech!
    0.0 s of 23.8 s skipped
    A browser promotion nested inside a product segment was read as an editorial recommendation.

7 videos without a sponsor read: 0 seconds skipped by mistake.

* Two passages were held for manual confirmation. Held time counts as missed. A browser promotion nested inside a product segment was read as an editorial recommendation.

How the test was run

  1. 01Chosen blindThe newest suitable upload from each of the first 20 reachable channels on a fixed list, picked before any detector call. None of the 20 videos appeared among 9,970 earlier analysis files.
  2. 02Read twiceTwo independent AI readers went through all 9,340 caption lines. Every disagreement between them was settled against the source.
  3. 03FrozenThe reference, the sources and the detector build were locked by SHA-256 before the first call. Nothing was tuned on these results.
  4. 04No second chancesNo best-of selection, no reruns based on results, no videos removed afterwards. All 20 stay in the score.
  5. 05Strict scoringOnly cuts that skip without confirmation count. Passages held for review count as missed. Uncertain edges are excluded, not claimed.

Follow-up measurements

On the live system, against SponsorBlock's community timestamps.

The detector has been updated since September 15. Later builds were measured against SponsorBlock's community timestamps instead of a frozen reference. That yardstick reads lower for a known reason: most of the difference is transition sentences around a sponsor read, which SponsorBlock marks and SponsorSkip deliberately leaves playing.

TestVideosSponsorBlock sponsor time skippedNotes
September 29 · live production system20 new89.0%0 s of editorial content skipped. Every second skipped outside SponsorBlock's marks was checked and was ad copy.
September 30 · current build, live since October 13093.1%Borderline skips outside SponsorBlock's marks include a 1.1 s transition sentence.
All 20 videos of the September 15 test
VideoSponsor timeSkippedLeft playingSkipped by mistake
The Steam Frame Changes Everything - Full Review71.0 s74.1%18.40 s0.00 s
The Best Car I've Ever Driven: McLaren W1nonen/a0.00 s0.00 s
We bought the most Extreme Gaming Tech!23.8 s0.0%23.80 s0.00 s
This mechanism shrinks when pulled114.9 s99.7%0.32 s0.00 s
The Wild Story of the Teton Dam Failure129.8 s100.0%0.00 s0.00 s
Can You Turn a Rainbow Back into White Light?99.0 s100.0%0.00 s0.00 s
I Struck A Match With a Bullet (380,117 frames per second SlowMo) - Smarter Every Day 294142.3 s100.0%0.00 s0.00 s
Solving problems by adding a dimension13.2 s100.0%0.00 s0.00 s
New shape discovered!117.1 s100.0%0.00 s0.00 s
The Abel (not Nobel) Prize - Numberphilenonen/a0.00 s0.00 s
Do these Viral Recipes Really Work? Let’s Test Themnonen/a0.00 s0.00 s
The last bite I'd take before the end62.6 s100.0%0.00 s0.08 s
Is it ACTUALLY cheaper to cook at home compared to ordering out?nonen/a0.00 s0.00 s
What is Dodge Even Doing?39.7 s100.0%0.00 s0.00 s
How to PROPERLY Install a Quick Release Steering Wheel (with Working Horn)nonen/a0.00 s0.00 s
MORE Bad News for AI (and GOOD news for us!)61.0 s100.0%0.00 s0.00 s
MSI Trades Security for RGB26.8 s100.0%0.00 s0.00 s
AMD Tried To Block This Review, But We Got The RX 9050 Anyway!59.6 s99.6%0.24 s0.00 s
Have a Pole? Need a Hole! (LATITY-017)nonen/a0.00 s0.00 s
Highway Numbers Aren’t Names. They’re Coordinates.nonen/a0.00 s0.00 s

Limits: the reference was built with AI-assisted reading of the original captions, not an independent human audio and video review. English videos with captions only. This is not a head-to-head accuracy test of other extensions, and not a guarantee for every video.

Download the raw results ↗

Community timestamps can miss the cut.

Our August 24 caption audit found early starts, late ends and category conflicts in saved SponsorBlock references. For example, our review put the return to content in an OverSimplified video about 6 seconds before the recorded segment ended.

The start matters, too.

In a RealLifeLore video, the recorded segment started about 123 seconds before the promotion, in the middle of the story. SponsorSkip's live result on October 19 starts at the promotion's first sentence.

These are examples from our caption audits, not a database-wide error rate. Community entries can change. View the recorded timestamps ↗

One video. 10 community opinions.Johnny Harris, “Oligarchy is worse than you think” · every sponsor submission, in the order it arrived
10submissions in 4.1 days
7ended with negative votes
16,551skips served from those 7
  1. 3 min161Submitted 3 min after upload
    Skips 47:58 to 48:14 (16 s)
    -2 votes · skipped 161 times
  2. 5 min107Submitted 5 min after upload
    Skips 19:14 to 21:32 (139 s)
    -1 votes · skipped 107 times
  3. 12 min41,205Submitted 12 min after upload
    Skips 19:13 to 21:32 (139 s)
    +4 votes · skipped 41,205 times · locked
  4. 18 min7,306Submitted 18 min after upload
    Skips 47:58 to 48:14 (16 s)
    -2 votes · skipped 7,306 times
  5. 54 min1,380Submitted 54 min after upload
    Skips 30:51 to 31:23 (32 s)
    -1 votes · skipped 1,380 times
  6. 2.2 h27,045Submitted 2.2 h after upload
    Skips 30:41 to 31:23 (42 s)
    +1 votes · skipped 27,045 times
  7. 2.8 h7,340Submitted 2.8 h after upload
    Skips 30:41 to 31:23 (42 s)
    -1 votes · skipped 7,340 times
  8. 15.5 h4Submitted 15.5 h after upload
    Skips 30:41 to 31:23 (43 s)
    -2 votes · skipped 4 times
  9. 15.6 h19,049Submitted 15.6 h after upload
    Skips 47:58 to 48:14 (16 s)
    +1 votes · skipped 19,049 times
  10. 4.1 days253Submitted 4.1 days after upload
    Skips 0:07 to 2:50 (164 s)
    -2 votes · skipped 253 times
Ended with positive votesEnded with negative votes

Source: SponsorBlock public API, fetched 2026-10-19. SponsorBlock counts a skip each time a segment is skipped for a viewer; when the votes came in is not public. Raw data ↗

Detection and transcript tools.

SponsorSkip analyzes available captions, highlights sponsor text and lets you search and jump through the video. Undo an unwanted skip and the same selection is remembered on your device.

Start free, then choose Pro or Ultra.

Your first 20 videos are free. Pro allows up to 200 new video analyses a month and Ultra up to 1,000, both with transcript search and one-click undo; videos that were already analyzed don’t count. Compare our plans and limits → SponsorBlock is free and also offers community categories such as intros and outros.