1. Open VLC Player and open the video you want to crop.
2. Click on the Tools menu and select Effects and Filters.
3. Select the Video Effects tab, then click the Geometry tab.
4. Check the box next to Crop and enter the value for the top, bottom, left, and right margins.
5. Click the Save button to save the settings.
6. Click the Play button to play the video with the new crop settings.
7. Once you are satisfied with the settings, go back to the Tools menu and select Convert/Save.
8. Select the video you want to save and the destination folder.
9. Click the Convert/Save button and the cropped version of the video will be saved.