Eclipse Imaging #5 Aerial video / time lapse of moon shadow creeping over the land

This is probably the most far out idea. I want to fly the Mavic as high as possible and take a video or time lapse of the final minutes before the eclipse. Point the camera towards the horizon and hopefully see how the shadow of the moon creeps over the land. And then rely on the Mavic that it will auto-land once the batteries are low

Equipment: Mavic Drone - that's it!

Things to figure out:

• Can I take images from the horizon to our location from the maximum height?
• The shadow will be VERY fast (supersonic speed!!!) - What frame rate do I need to use
• How long of a video can I shoot with that frame rate?
• How long can the Mavic stay up there?

Scary is that during the eclipse it could get quite windy. Will the drone just be blown away and/or miss it's home landing zone?