Ok, so several issues to consider:
First, when you showed the Model Info/Statistics screenshot, it showed only 16,000+ edges but if you check ‘Nested’ it’s becomes 15,300,000+ edges. Really big model for most machines.
Second, purge unused and fix problems in the model as that will reduce model size down to 196 mb…not a big change but every little bit helps.
Third, do you need edges and shadows to show? That takes more time to process each scene as it switches from one to the other…especially when the high-poly vegetation layers turn on. I’d recommend updating the style that you’re using in the scenes to not show edges or profiles if not needed.
Fourth, you can try exporting smaller size ie 720p instead of 1080p) and / or reducing frames per second. I tried it with 24 frames/second and it told me it was going to export 3,458 frames to make the animation…that takes awhile, again, dependent on your machine.
Lastly, I got about a third of the way before quitting SU as it was taking too long to export. From the part of the video that did export…it looks like there’s no motion…just layers turning on. If that’s the case, I’d just export the scenes as 2D image files and composite them in another program vs making SketchUp duplicate the scenes so many times to make it appear to animate as the scene’s layers build up.