Quick question - as stated in the title. Is that possible? I thought the following endpoint would be my best shot: https://developers.google.com/youtube/v3/docs/comments/update, but can't find anything that resembles api call for rating a video, nor did I find any documentation on that for v3
If it is, please point me to the http endpoint.
Partially Yes, You can use that endpoint and specify a value for snippet.viewerRating but as of now it only allows you to specify two values like and none.
The rating the viewer has given to this comment. Note that this property does not currently identify dislike ratings, though this behavior is subject to change. In the meantime, the property value is like if the viewer has rated the comment positively. The value is none in all other cases, including the user having given the comment a negative rating or not having rated the comment.
来源：https://stackoverflow.com/questions/34339966/youtube-api-v3-rate-like-dislike-comment-commentthread