You can change the title of your video by visiting your video's settings page. Here's how to do so from the Library.
To change the title of your video:
- From the Library, select the video you would like to rename.
Select the title at the bottom of your video and type in your new title.
After typing in your new title, select Enter on your keyboard or select the checkmark in the textbox (✓).
The changes will automatically be saved and the title of your video will be updated.
To learn how to change the title of your video on a mobile device, visit How do I rename my video in the Vimeo mobile apps?.