Export failed due to resolution changes

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The most natural way to crop an entire video to remove black bars now is to click and use Export > Video > Reframe.

Reframe Output Video Filter

Reframe or reframing is a way to crop a video or editing project in order to export it to a different aspect ratio. For example, you made a video project in 16:9 aspect ratio landscape/horizontal orientation but now want to make a 9:16 portrait/vertical orientation video for social media. Other forms of cropping are used primarily within a composition to remove bad edges (Crop: Source), zoom in to fill the frame (Size, Position & Rotate), add colored borders (Crop: Rectangle), or clip an overlay…