How can I check the success of my deliveries?
The Deliveries tab in Video Central displays new validations for your MEC files and for artwork. Check this tool as you upload files to make sure they successfully are ingested in the Prime Video catalog. If your artwork remains in an Awaiting Match to Manifest status, verify your MEC file to make sure that it references the correct artwork filename.
How should Region values be treated in the MEC LocalizedInfo block?
Region values are optional and typically used for artwork compliance purposes in a territory. They aren't required unless for these purposes and can have multiple LocInfo blocks with different Language values. When you declare a Region and an ArtRef in a Region, it must include one Boxart purpose.