There appears to have been a recent update related to Disney+ that makes it possible for movies to autoplay instead of going to the landing page (unfortunately, TV shows seem to still go to the landing page). To take advantage of this, you'll need to create a new Stream Link Mapping as so:
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If 'Stream Link' contains:
disneyplus.com/browse/entity-
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For 'Object Type':
MOVIE (don't do this for TV Shows right now)
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Do this activity:
Replace string with...
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Using this:
disneyplus.com/play/
I've added this to the default list for new installs (on a future release), but existing users will need to add this themselves.
EDIT: It doesn't appear to be every movie; some still have the old format that will go to the landing page.
EDIT 2: Upon further inspection, some TV Shows have the new format, but it's generic and and not tied to individual episodes (or any episodes, for that matter). Mapping them will actually just get you an error from Disney+. As such, make sure this Stream Link Mapping is only for MOVIE.