[BUGFIX] Use correct url schema in MediaWizardProvider

If the media provider supports https, the video should be
embedded using https instead of http.

Change-Id: Id6f1677acfd82ba071c2425f345ea20b48de9cfe
Resolves: #50041
Releases: 6.2
Reviewed-on: https://review.typo3.org/22345
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind