Where is the fucking video????
Why the code disappears?
It seems like you have not read my previous reply carefully .
it states :
" Note here that since embed code is some html ,it is recommended to put the iframevideo shortcode and embed code in back end edit unit page in text mode . "
Try adding the shortcode and the video in text mode in back end unit edit page :
check out this video : http://screencast-o-matic.com/watch/cbnY2n6oXJ
Well here is an example video to show that it works from front end edit too : http://screencast-o-matic.com/watch/cbnr2M6DqM
Note here that now youtube added a div tag in its embed code which is why the issue is appearing ,you need to manually remove this div tag as shown in video also .