You can add custom thumbnails to your videos which is a great way of customizing/branding your videos.
1. Navigate to Personal Library in the Navigation Menu and click the video for which you want to add a custom thumbnail.
The video details will be displayed.
2. In the Edit Your Video section, click Thumbnail.
The Upload Thumbnail section will be displayed on the left side. By default, a frame of your video will be added as a thumbnail to your video.
3. To delete the default thumbnail, click the delete icon at the top-right in the Upload Thumbnail section.
The section to upload a custom image for the thumbnail will be displayed.
4. Drag the image that you want to set as the thumbnail for the video and drop it in the Upload Thumbnail section.
Note: The recommended size of the thumbnail image is 832px x 536px and the recommended formats are .png and .jpg.
5. Click Save.
The uploaded image will be set as the thumbnail of the video.