A "keep rotation" or even "set rotation metadata flag" (better of the two) option would be good!

Like the title says, it would be nice to see that a video (for example one taken in portrait mode by a phone) has a 90 degree rotation metadata flag set on it, and then we can choose to either keep it or change it to whatever else we would like for the output video.

They should give us the option of asymmetric cropping. Even better would be the ability to adjust cropping using the mouse to move the crop boundary box.