Guide

1. Head over to the left-side panel and click 'Content'.

2. After that, hover your mouse cursor over the video you want to edit and tap its corresponding 'Details' button.

3. Click 'Editor' to proceed.

4. Subsequently, tap 'Get Started'.

5. Choose 'Trim & Cut' from the list of options.

6. Following that, grab the trim handle and drag it to your desired timestamp.

7. Repeat the same step using the other trim handle.

8. Once done, click 'Save' in the top-right corner.

9. Tap 'Confirm Changes' to continue.

10. After completing these steps, the selected YouTube video will be trimmed instantly.