I have recently started using podpress to embed Youtube videos on one of my sites. I love it, but the videos are set to play by default on page load - which is generally frowned upon as bad manners (and is chaotic if I have two different videos on one post). Can you remove the autoplay=1 in the URL generated by the plugin?
Also, I did search the settings pages and I don't think there is any way to set this parameter from the UI. Might be a nice addition...