Does YouTube's API allow uploading and setting of thumbnails?

Question

I haven't found anything in their documentation or on the web that says yes or no. Using the Python library.

Answer 1

Apparently thumbnails can't be updated, per the docs -- media:thumbnail is not listed among the tags you can set on update. On uploading the video, yes, you can have media:thumbnail tags as part of your media:group tag which gives the video's metadata.