As discovered in #2880654: Instagram loading can't be manually triggered embedding an instagram in ckeditor doesn't work. Seems like the instagram javascript doesn't provide loading of instagrams inside of iframes.

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chr.fritsch created an issue. See original summary.

chr.fritsch’s picture

Status: Active » Closed (works as designed)

1.x is unsupported and embedding works through media_library in 3.x. So, closing.