Youtube

Youtube Thumbnails API

Manages custom video thumbnail images, enabling upload of a custom thumbnail image for a video that the authenticated user owns.

GitHub

Documentation

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Documentation
https://developers.google.com/youtube/v3/docs/thumbnails
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GettingStarted
https://developers.google.com/youtube/v3/getting-started
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Authentication
https://developers.google.com/youtube/v3/guides/authentication