When I edit a journal entry with an embedded YouTube link (just raw paste of YouTube URL), selecting the Publish button will remove the embedded YouTube video.
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Steps to reproduce:
1. Have a journal entry with an embedded YouTube video. The video auto-embeds if the raw YouTube URL is pasted in the entry. See the following link for a journal entry which is set up in this way:
http://www.gamedev.net/blog/1830/entry-2259889-animation-showcase-annotations-fixed/
2. Select "Edit entry".
3. Without changing anything, select "Publish Now".
Observe that the embedded YouTube video is now gone.
4. Select "Edit entry" again.
Observe that the YouTube URL has been replaced with an empty line.
Note that, after step 2, selecting "Preview Post" instead of "Publish Now" will remove the YouTube video from the preview post, but will have an embedded YouTube video in the post edit field.
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Browser is Chrome, whatever the latest normal version is.
OS is Windows 7.