No lut, Aces transform to Acescct with Davinci Resolve and color grading

You need to change the ratio of your video. To get the good dimensions, search : "ASPECT RATIO CALCULATOR" With Davinci Resolve, you can set the dimensions of your timeline, and all the footage will resize automaticaly with "scale the entire image to fit" in the timeline option. Or you can set the ratio of each shot in the media pool.