When I am trying to add the video using youtube plugin in ckeditor4 the preview is visible but when I am trying to edit the content the preview of the video is not visible in ckeditor there is only iframe preview is there This is coming on edit page preview This is what I am getting on edit page preview
I am expecting that on edit the preview of the video should also be visible expected This is what I want on my edit page preview
Ok here is a example solution probably what i got from your issue. The issue is that by default ckeditor change the content of youtube plugin. so you can try using putting these lines (allowedContent: true) . I also attaching the example below cdeditor with youtube plugin
