Add Variable Functionality

This plug-in would benefit a lot from allowing the user to add variables via prompt.

For example:

Prompt: 'Enter YouTube video ID'

OutPut: <object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/[user input]&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/[user input]&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>