Spinning Wheel in MP4

Greetings! I am using Captivate 7. I saved my project as an MP4 and then uploaded it to YouTube, but there is still a spinning wheel in between the slides. A similar question was asked here, but I've yet to find a solution:

https://forums.adobe.com/thread/1692048?q=spinning%20wheel%20mp4

Thank you!

Jyoti