Question: When is a user video scanned by Content ID to see if it matches any delivered reference material?
- As it is uploaded and at intervals later on
- Only when it is first uploaded and published
- When an ad is placed on the video
- After it has received more than 1000 views
Explanation
Content ID automatically scans videos when they are uploaded to YouTube. It compares uploaded videos against the digital fingerprints created from delivered reference files. Videos may also be scanned again later as new or updated reference material becomes available. This ongoing matching process helps rights holders identify uses of their copyrighted content over time.
Why the other options are incorrect
First upload only is incorrect because matching can also occur after the initial upload.
Ad placement is incorrect because Content ID matching is not triggered by advertising activity.
View threshold is incorrect because scanning does not depend on a minimum number of views.
Source for verification
https://support.google.com/youtube/answer/2797370
https://support.google.com/youtube/answer/107004
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