I feel like it should have been a part of video upload action but it isn't. The video upload action only contains title description tags, video file, and categories but not the video thumbnail.
Will I need to create a new trigger and action to set YouTube thumbnail or will I be able to add thumbnail in the same workflow shown in the video? If I need to create a new trigger+action, how do I retrieve the most recent video ID so that I can set it s custom thumbnail?