How to crop a YouTube video
If you use YouTube, and you need to crop the video, then you can use the Video Editor in the Creative Studio of YouTube. Thanks to it, you can cut any fragment from the video. The advantage is that you won't need to re-upload, and the link, the number of views, and all comments will remain in place. This function is available if the video lasts no more than 6 hours.
If you need to crop the beginning or end of the video, then you need to:
1. Click "Crop", after which an area with a blue selection appears.
2. Drag the borders of this area as needed. The selected fragment remains, which should be left. Everything that remains outside of it will be deleted.
3. And in order to make sure that you did everything correctly, you can select "View".
4. Just click "Save".