I'm trying to upload a Microsoft Word Notebook Layout document (that includes images, video and text) to YouTube.
Unfortunately that cannot be done.
The hand-wavy answer to your question would be that for YouTube to extract the video, or somehow interpret a Word document as a video, is out of scope for their service. Basically, you'll have to upload a ready-made video file.
You have two choices:
My tip would be to get your content into PowerPoint, and use a software package to convert your PowerPoint file into a video file. There are existing converters out there, as well as screen recorders that would help with this part.