said 1 year, 3 months ago:
You might have done all of these things but this what I would do:
Check out the FAQ’s on the plugin page: http://wordpress.org/extend/plugins/smart-youtube/faq/ - gives you some tips on how to use the plugin.
Second thing I would do is go to the plugin developer and ask if there is a work around for the Woothemes Canvas.
Lastly, I would go to Woothemes and see if there is a work around for the Smart YouTube plugin issue for the Canvas theme.
Generally speaking I have had better luck with speaking with the developers of plugins for resolving issues than theme developers.