Explore the method
Coverage and limits
What is transcribed, what is not yet, the known limits, the corrections log.
The state of transcription
Of the 72,073 videos tracked, 35,388 have been extracted and 29,352 transcribed. In the last seven days, 1,519 videos were transcribed.
Last detection: 43 min ago. Last transcription: 8 min ago.
| Year | Videos tracked | Share transcribed |
|---|---|---|
| 2016 | 1,855 | 43% |
| 2017 | 1,749 | 40% |
| 2018 | 1,496 | 41% |
| 2019 | 1,380 | 50% |
| 2020 | 2,237 | 52% |
| 2021 | 3,902 | 65% |
| 2022 | 5,610 | 69% |
| 2023 | 7,432 | 74% |
| 2024 | 10,569 | 65% |
| 2025 | 10,915 | 28% |
| 2026 | 11,284 | 24% |
The limits of the data
Transcription
Automatic transcription contains errors, more frequent on noisy recordings, overlapping speech and proper names.
Classifiers
Their results are estimates.
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The theme classifiers detect a subject, whatever the position expressed. A percentage computed on too few sentences is not published.
Coverage
The share of videos transcribed varies by year and orientation.
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In early October 2026, few French far-right videos published in 2025 and 2026 have been transcribed: a single Quebec channel supplies most of the far-right political sentences for those two years.
Orientations
These are research categories assigned to whole channels.
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A single video may depart from them.
Deletions
A deleted video has become unavailable: removed by the platform or the author, made private, channel closed.
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The reason is known only if the platform states it.
Automatic texts
Summaries, arguments by theme, records of deleted videos and section texts are written by our local language model.
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They are not reviewed and may contain errors of detail.
October 2026 audit
Collection errors were found: like counts under-reported since March 2026, missing dates on part of the comments, comment deletions wrongly counted.
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The bulk corrections are logged below.
Corrections log
Main bulk corrections applied to the extracted data, with the rule used.
| Date | Data | Rule applied | Rows |
|---|---|---|---|
| 3 October 2026 | Comment sentences, YouTube comments | Dates of comments captured with the French interface (“il y a 3 mois”): recomputed from the time of capture, as for the English interface. | 6,238,021 |
| 3 October 2026 | Audience measurements | Empty audience readings, recorded for seven minutes by a faulty version of the collector: removed, they are not observations. | 15 |
| 3 October 2026 | TikTok comments | TikTok comments: the source channel, replaced by a technical identifier during distributed collection, is restored from the video. | 4,702 |
| 3 October 2026 | Like and view counts, Comment sentences | Video likes shown with comments: the value is read from the corrected video record instead of the copy kept with each comment. | — |
In addition, the like count is not shown when it is below 0.05% of the views of a video viewed at least 10,000 times: such values come from a reading error during collection.