I have a hosted website running Wordpress and a plugin that places recent posts from my Facebook page and Twitter feeds onto a specific page.
I am trying to move my site to using https. It is on a dedicated IP with a private SSL certificate.
If I share a YouTube video onto my Facebook page, although the link to the video itself may be an https link, the thumbnail image always appears to be from the non-secure YouTube URL
This is the YouTube video in question in this instance:-
When I paste this URL into Facebook, the thumbnail image that is shown is:-
Subsequently, when the plugin loads my social media feeds, my site loses it's padlock because of the YouTube image.
Is there a way to force thumbnails from https://i.ytimg.com
rather than http://i.ytimg.com