It plays half the video (youtube embed).
You are isn't clear. Please re-type your question in other words.
Or, don't respond if you don't understand the problem
Rude response for someone trying to help you out.
You used facing page spreads and converted to single landscape pages on export. This has been a known issue for years and still isn't fixed. The only work around is to reacreate the document as single pages.
This is what I feared, it's insane that it converts to landscape but still keeps the divide. Why would anyone want that as a default?
Can I remove that divide, without altering the rest of the document?
What you could try is to add a new single page in place of the spread. I haven't tried that myself so I can't swear to what would happen when you export it. Shouldn't take long to test, though.
If you do try, please let us know if it works.