At 70 degree upward angle, I see no way to point my camera at the Sun. Other than someone's suggestion earlier of holding the drone in your hand. Can't see much point in that.
I'll have total eclipse here for a minute or so. 60 miles South of me is the best. I think I'll try hovering at a high altitude with my camera angled down about 20 degrees and see if I can record the shadow as it approaches.