A method comprising: determining an estimation of an original motion path of a camera that recorded a video; selecting a crop window size being less than a size of a video frame of the video; determining a crop window transform to transform the original motion path of the camera to a modified motion camera path, wherein a crop window associated with the crop window transform is constrained to the crop window size; determining a smoothness metric indicative of a degree of smoothness of the modified motion camera path; selecting a smaller crop window size, the smaller crop window size being smaller in size than the crop window size; determining a respective crop window transform and a respective smoothness metric corresponding to the smaller crop window size; determining a change in value between the smoothness metric and the respective smoothness metric; and based on comparison of the smoothness metric to a first predetermined threshold (310; 320) and comparison of the change to a second predetermined threshold, applying the crop window transform to crop the video, in view of the crop window (312; 322; 326), and to provide a modified video from a viewpoint of the modified motion camera path, wherein the comparison of the smoothness metric to the first predetermined threshold (310; 320) provides an indication of a degree of absolute smoothness of the modified motion camera path that indicates how close the modified motion camera path is to being a constant path, and wherein the comparison of the second predetermined threshold to the change provides an indication of a degree of relative smoothness of the modified motion camera path as compared to the respective modified motion camera path in case the respective crop window transform is applied. determining an estimation of an original motion path of a camera that recorded a video; selecting a crop window size being less than a size of a video frame of the video; determining a crop window transform to transform the original motion path of the camera to a modified motion camera path, wherein a crop window associated with the crop window transform is constrained to the crop window size; determining a smoothness metric indicative of a degree of smoothness of the modified motion camera path; selecting a smaller crop window size, the smaller crop window size being smaller in size than the crop window size; determining a respective crop window transform and a respective smoothness metric corresponding to the smaller crop window size; determining a change in value between the smoothness metric and the respective smoothness metric; and based on comparison of the smoothness metric to a first predetermined threshold (310; 320) and comparison of the change to a second predetermined threshold, applying the crop window transform to crop the video, in view of the crop window (312; 322; 326), and to provide a modified video from a viewpoint of the modified motion camera path, wherein the comparison of the smoothness metric to the first predetermined threshold (310; 320) provides an indication of a degree of absolute smoothness of the modified motion camera path that indicates how close the modified motion camera path is to being a constant path, and wherein the comparison of the second predetermined threshold to the change provides an indication of a degree of relative smoothness of the modified motion camera path as compared to the respective modified motion camera path in case the respective crop window transform is applied.