I've recently switched my wiki to https, see e.g. https://bjohas.de/wiki/Google_Docs_Helper_bookmarklet. However, the YouTube widget no longer works. Definitely sure it's to do with https, because if I switch https off, it works again. Of course, it may well not be to do with the widget, but with my overall wiki configuration.
To configure the wiki, I switched the .htaccess file to require https, but didn't change LocalSettings.php. Maybe there's something I missed?