Creating content dynamically via 'Create Post content template'

Hi,

I'm allowing teens to post stories of public service that they're doing in their communities.

Here's the link to the page: http://sharingservicestories.org/?page_id=176

In the Body field (which I've renamed 'Details') on the form, I concatenate the fields as follows:

{Upload Image:8:medium:left}{Details:3}

[youtube]{YouTube URL::6}[/youtube]

So, what I'd like to do is to embed the video as part of the post, if they've provided a YouTube URL.

I was hoping that if they didn't provide a video URL, that the Viper's Video Quicktags plug-in would just ignore it, but what it is doing is giving me an error message.

Is there a way that I can use conditional logic to have two versions of post content, one with the video and one without?

Thanks in advance,

Robert Ford