Hi @macpheek,
The preview image overlay is stretched to fit the embedded space whether it is in portrait or landscape orientation (you can see that the preview is stretched wide on desktop devices). The CSS for this is coming from the video host and not the Google Drive Embedder viewer.
Would you please send us an email to contact [at] wp-glogin [dot] com so we can arrange to get some login credentials for your clients site and Google Drive for the developers to take a look at this and the iPhone video play issue in the other ticket.
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This reply was modified 3 years, 2 months ago by PDFG Support. Reason: typo