The difference between Image Banners and List Banners, is where they are. An Image Banner is on the home screen of your app, and a List Banner is in a media source of some kind. Whether thats a banner above a custom list, podcast, Vimeo or YouTube feed, it's up to you.
To add a list banner in media source:
1. Edit your media source (this could be a custom list, podcast, Vimeo, YouTube, etc.):
2. Upload your List Banner:
And you're done!
Don't forget to SAVE CHANGES and GO LIVE if you're ready to see it in your app.