I always find it challenging to rotate the horizon on my aerial footage in Adobe Premiere. There is no way to quickly and easily display a grid, so it can be difficult to verify the horizon on your footage is perfectly level. I made a transparent grid that you can put on your footage, then you can rotate the horizon on your footage as needed, and then delete the grid. You can drag the grid into your project and delete the layer when complete. It’s quick and easy.
4K Grid For Aerial Footage – Adobe Premiere Pro
PSD Grid Downlod – 4K Grid