The issue I'm reporting is rather a cosmetic problem but still quite annoying for our power-users who make use of many recordings within a single activity in Moodle.

Reproduction of Issue:

1. Create new video conference with Moodle plugin and activate recording.
2. Enter the conference and record some sessions (more than one - you can also end session and reopen it, just make sure to have a few recordings in your list)
3. Hide one or more recordings in the list
4. View as Student and you will notice, that the lines where recordings have been hidden appear as empty lines