Videos does not stop playing when closing modal

[dagraf]

Describe the bug
Bug only exists, when in the config of the plugin the option "Open player in modal" is activated (see tab "Settings", subtab "Events"). When a user opens a video by clicking on the button "Play" and then on the play icon, the modal gets opened and then the video starts. When the user then closes the modal, the modal gets closed but the videos keeps running leading and the audio is still aadible via the speakers

To Reproduce
Steps to reproduce the behavior:

1. In the config of the plugin: Activate the option "Open player in modal" (see tab "Settings", subtab "Events")
2. Click on 'Play' on any video and then on the play icon in the opened modal
3. Close the modal by clicking on the 'x' in the top right corner
4. See error: Video does not stop.

Expected behavior
When the modal of a running video gets closed the video should stop.

Environment (please complete the following information):

• ILIAS version: v7.26 2023-10-23
• Plugin version: 5.6.0
• Opencast version: 14
• Browser: Firefox

Additional context
Bug also exits in PR #237.