I've implemented a basic player as per your instructions, loading v1.9.1 from the unkpg.com locations.
My video plays when clicked, but only ever shows a black poster. I can see the poster jpg is in the derived files for the video asset.
I've tried specifying the poster file but am really confused how to get the publicId for the auto-generated (default) poster file because the JS seems to keep looking in image/upload/... not video/upload/...
My understanding is that without a specified poster it will show the default from the middle frame of the video - but it is not.
> Edit: It seems this problem is only when using a raw URL, using a publicId as the source and the poster appears. However, I can't figure out how to apply the sp_auto transformation via this approach.
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