1. Import Your Video Clips
To import a video clip, launch Wondershare Filmii, click the Start from Scratch button from the right window of the interface, click Import File from the Media window present at the upper-left section, and select and import the source media file that you want to crop.
2. Crop Videos for Various Social Media
Hover mouse over the thumbnail of the imported clip, click the + button that appears at the bottom-right corner, select the media in the Timeline at the bottom, go to the Tools menu at the top, and click Crop and Zoom. On the Crop / Pan & Zoom window, ensuring that the Crop tab is selected, drag any of the four crop handles to reduce the area of interest and reposition the focus rectangle to keep the unwanted portion of the screen out of it. Optionally you can use the Screen Size drop-down list to pick your preferred aspect ratio.
Note: Selecting Custom enables you to enter custom screen dimensions as needed. Finally, click OK to save the modifications and to close the Crop / Pan & Zoom window.
3. Export Your Cropped Video
Preview the video by clicking the Play button in the Preview window. If everything seems fine, click Export from the top of the main interface, and follow the on-screen instructions to export cropped video to your preferred format that complies to the social media platform you are about to publish the clip-on.