The easiest way to do it from the Organizer is to use the Revel option under the Share tab. This will send an optimized file to Revel. You do essentially the same thing from Publish & Share in Premiere Elements 12.
Adding files to Revel by dragging them into the Revel folders on the left side of the Media Browser sends the original file to Revel -- not an optimized file. Optimized files are for sharing with your friends. Saving the original file to Revel means that you'll be able to download and use it in a video project in the future.
The difference,as you've found, is that the original file is pretty large. It doesn't go to Revel in a few seconds. But, if you drag a Revel folder onto it and then just leave it. (You can even shut off the Organizer and go about other work) it will eventually make its way up there.
If you want to know more about these programs, you might want to check out my books on Amazon and at http://Muvipix.com/pe12.php
If i use the Revel icon it downloads 13 seconds but no more
You may be interested to read about my detailed encounter with Premiere Elements 12 Windows and Adobe Revel.
I intend to revisit it again for re-evaluation, but my initial work with it made me question its presence in a video editor at its present stage of development.
Looking forward to your results.