"Is the MIME type on the video somehow getting changed the you upload to domain #1?"
I don't see how it would be. I have nothing in the code to change it.
"What happens when you load the video URL from domain #1 directly in a web browser?"
You mean d&d the .mp4 into IE? I get a message asking me if I want to open or save the file. Standard fare there. If I click "open", the vid opens in VLC player, which makes sense, as that is what I have set to open a file with that extension. If I change that from VLC to IE, I get the same message, and when I click "open", the vid tries to open in IE, but can't. Does that tell us anything? Remember, tho, the file DOES play in IE11 from domain #2.
It would be much easier to help troubleshoot this issue if you could provide links to test pages on both domains. If you uploaded the video to us, you can access a JW Platform preview page with the following URL template:
Your account dashboard assigns a unique media ID to each video or external video URL you add to your dashboard. The player ID is also a unique ID that is assigned to each player you create. When the dashboard shows you the single-line embed, it is basically inserting those IDs into the template URL.
We are working on a way for users to send private messages via our support forums. In the meantime, please e-mail us a link to firstname.lastname@example.org and reference case #79341 in the subject so we can refer back to this thread.
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