Here are some links to some sights where you can view firework displays:
http://www.pyroinnovations.com/videos.html This site has some rather large downloads but includes live shows for New Year’s and the 4th of July at various locations. They also have videos on setting up for firework shows.
http://mashable.com/2009/07/04/fireworks-youtube/ This link has 7 firework shows that are on Youtube.
http://www.woodlands-junior.kent.sch.uk/customs/guy/fireworks/ This site has “make your own” fireworks display online, as well as teaching resources.