[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, 6.1, 6.0
Reviewed-on: https://review.typo3.org/22375
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer