Plugin "forgets" and/or randomly changes video visibility

[rwegem]

Version
2.16.2

Describe the bug
Videos cannot be played although users should be able to play them.

To Reproduce
Steps to reproduce the behavior: I wish – behavior seems random and cannot be reproduced!

1. Go to event
2. Click on 'Opencast' tab
3. Possibly one or more videos seem to be set to "only visible to you"
4. Click on '2' (= next page of videos)
5. Click on '1' (= previous / 1st page of videos)
6. See error: the same video as before now has the setting "visible to participants"

Expected behavior
Any video should – without any further user interaction – keep and retain its setting for visibility.

Result of Bug
Video thumbnails are visible to participants but videos with unstable setting as described above cannot be played. Instead, an error message is displayed.