This is a Metadata Agent for adding a static poster or background images to movies. The intention of this agent is to prevent spoilers on specific libraries like TV recordings. Both images can be overwritten by custom ones. Full qualified path is required for that.
See the How do I manually install a channel? support article.
currently I am thinking about a library without any thumbnails esp. for sport recordings. Unfortunately Plex always generates thumbnails. Therefore I have the following idea: Why not adding an agent which copies a static image to each movie found without adding it manually?