To further clarify your request here, you want a video of the work you've done so far? Is that right?
Reason I ask this, is there is already "Version History" available in your document which could suffice as a form of recorded progress. You can find Version history by clicking the downarrow next to your open document's name.
Does this suffice? Or is the video what you're after?
If it's the video, how would you use the video? is this for your own usage/memory? or for sharing with others I wonder?