Plugin not handling HTTPS

Am using your plugin – but if it is a site that is on https – then the youtube video embed code should change automatically to https. However it stays as http – which means that the lightbox does not show the video (and there is an error in the console (the secure page is requesting an unsecured url which gives that error).

Can you please fix it?

https://wordpress.org/plugins/wp-youtube-gallery/