Keynote will only export 1 second of my 11 second movie... please help

Hello community,

I am having trouble exporting my movie from Keynote to my desktop. Here's some background on what I did/trying to achieve:

• Created a movie in iMovie that is 11 seconds and wanted to format it to 1080 x 1080 for Instagram
• Saved iMovie (as high quality) onto desktop
• Opened Keynote, changed document size to 1080 x 1080 to create template for movie
• Uploaded my 11 second iMovie movie into Keynote and adjusted it to fit the created template
• Unchecked boxes like - 'start movie on click' so it would play automatically.

Now here, when I play the movie, as it sits on the template as a draft, the whole 11 seconds play. But, as soon as I hit 'play full screen' to view it as a finished work, or export the movie to desktop, just ONE second of my movie plays. I cannot for the life of me figure out within the settings why this is happening.

Please can someone help? I hope my explanation made sense. If you require further info, please let me know. I am using a Macbook Pro Monterey 12.3.1, Keynote 12, iMovie 10.3.2

Thank you in advance for your time,

riolizzy