These domains are found in your content, but do not appear to support HTTPS content. After switching to HTTPS, the content included from these sites will no longer display within Moodle for users with secure modern browsers. It is possible that these sites are temporarily or permanently unavailable and will not work with either security setting. Proceed only after reviewing these results and determining if this externally-hosted content is non-essential. Note: This content would no longer work upon switching to HTTPS anyway.