During the recording import process `mod_bigbluebuttonbn_get_recordings_to_import` (`mod_bigbluebuttonbn\external\get_recordings_to_import`) is used to display available records to import.
To correctly display dates in tables BBB module use a 'formatter' attribute.
As in `mod_bigbluebuttonbn\external\get_recordings_to_import::execute_returns method` 'formatter' attribute is not defined it's value is removed from output and dates are not correctly formatted during when displaying the record list.

Steps to reproduce

In Site Administration enable recording imports (bigbluebuttonbn_importrecordings_enabled)
Create a course with a BBB activity instance and create a recordings.
Create another BBB activity instance and click on "Import recording links"
Using "Course" and "activity" select previous BBB activity.

Expected result
"Date" column should be correctly formatted

Actual result
Dates are displayed as timestamp.