Smart Crop uses Adobe Sensei to eliminate the time-consuming and costly tasks of cropping content for responsive design.
Video assumes that your AEM instance is running on Dynamic Media S7 mode. Instructions on setting up AEM with Dynamic Media can be found here.
Smart Crop coordinates are aspect ratio-dependent. That is, for the various smart crop settings in an image profile, if the aspect ratio is the same for the added dimensions in the image profile, then the same aspect ratio is sent to Dynamic media. Because of this, the same crop area will be suggested in the Smart Crop Editor. For example, a crop setting of 100x100 and 200x200 would result in the same smart crop being generated by the system.