Embed feature is if you are using an image hosted on another site like my Image Event picture hosting site.

If you are uploading an image from your computer or phone you want to use the upload feature.

I made a couple posts in the Test Forum previously on this subject

This one steps through uploading images directly to Ag Talk

http://talk.newagtalk.com/forums/thread-view.asp?tid=594850

This one is the embedding method if you already have the pictures online say in a photo hosting album somewhere.

http://talk.newagtalk.com/forums/thread-view.asp?tid=594849

Not quite as detailed as what the image tutorial had but hopefully enough to walk you through the steps needed.