SSL Error Using MyList Video Player for YouTube Playlist on WordPress Site
If you are receiving a mixed content SSL error for your Wordpress website - specifically that the YouTube thumbnails are using http instead of https - then make sure to check the JS file for your MyList Video Player plugin.
On line 195 there is a URL for the YouTube video thumbnail, which has http listed instead of https. Add the "s" and you'll be ready to go as far as the YouTube video thumbnails.
Screenshot below:
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