These calls can be used to manage the preview image of a video. There are two ways to update the thumbnail of a video: by uploading a new image from your computer or by selecting a position in the video to be used as thumbnail.
Because thumbnails have to be copied to our CDN after their creation, it takes a short while (about 10 seconds) before a new thumbnail ready to show.
The thumbnail of every video can be publicly accessed through our content server. Next to a thumbnail in the original dimensions (of the uploaded image or the original video), a number of thumbs resized to fixed widths is available.
Please use the thumbnail whose width best matches the container in which you will show the thumbs, to avoid trafficking too large files.