When you choose the format(s) you want to use for your video, you need to think about the size of the assets you put into that video project. VIBBIO uses the centre of the image/clip to make it fit the frame if the asset size and format doesn't match. 

If you are unsure how the image will be used, have a look at the preview in the review step - you will see there how the image/clip will be used in the video. 

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