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As of Get Simple 3.3.10, CK v4 is being used. (in that CHANGES.MD you'll find it specifies "CKEditor 4.5.9")
Avoid that CKE Patch. It isn't needed (now) and, as you note, does confuse matters.
A little youtube plugin installed for fine for me and should be a pretty straight forward test, though with that one you'll need to remember to add the button to your toolbar to verify it is working properly.
http://ckeditor.com/addon/youtube
As for autogrow behaving a bit differently than the others you are adding in, perhaps it is because autogrow is already included & expected? You'll find it commented out in the CKE config. It looks a bit different than the way we're supposed to install plugins though:
extraPlugins.push('autogrow'); instead of
config.extraPlugins = 'autogrow';
Avoid that CKE Patch. It isn't needed (now) and, as you note, does confuse matters.
A little youtube plugin installed for fine for me and should be a pretty straight forward test, though with that one you'll need to remember to add the button to your toolbar to verify it is working properly.
http://ckeditor.com/addon/youtube
As for autogrow behaving a bit differently than the others you are adding in, perhaps it is because autogrow is already included & expected? You'll find it commented out in the CKE config. It looks a bit different than the way we're supposed to install plugins though:
extraPlugins.push('autogrow'); instead of
config.extraPlugins = 'autogrow';
