[Plugin: Smart YouTube] How to start video at desired time

I want to start the embedded video at a specific start point. I read in the plugin description that this should be possible:

“Supports video deep linking (starting at desired point with &start=time parameter)”.

But I have no idea how to implement this. I see no option about timesettings on the settings page and just put &start=time behind the video link doesn’t work.

I have this code in my post:
httpv://www.youtube.com/watch?v=ppe3vSNZlF4&start=0:12

Can you please tell me what I am doing wrong?

http://wordpress.org/extend/plugins/smart-youtube/