Fix viewAspectRatio badly computed

[StaehliJ]

Description

Fix issue when displaying a 4:3 video in the demo with playlist view. The video aspect ratio was incorrectly computed and so the video may be displayed outside its parent.

Checklist

• Your branch has been rebased onto the main branch.
• APIs have been properly documented (if relevant).
• The documentation has been updated (if relevant).
• New unit tests have been written (if relevant).
• The demo has been updated (if relevant).
• All pull request status checks pass.