By default, attachments do not have a version query parameter, like, for example JavaScript files have. This plugins adds version numbers to the query strings of attachments.
Version numbers in query strings are useful for caching. If an attachment changes, its version number and, therefore, its URL changes. This allows for the attachment to be cached for an extended period of time or indefintely, for example, with the directive “immutable” of the Cache-Control header.

Attachment URL Version

Adds the version number of attachments to their URL.

Ruslan Mikhno

This is a very simple plugin that allows you to bulk change author for media files.
The action is added in the “List” view of the Media Library.

Bulk Change Media Author

Bulk change author for multiple media files, using the default WP Media Library.

Attachment URL Version vs Bulk Change Media Author