From now there are some movies online from Fallas 2008

Castillo's (Evening great firework displays)

Mascleta's (A lot of noise !, a Spanish rythmic compilation of Trueno's (loud fireworks) from start up to a climax at 5 a 6 minutes)

Crema's (Burning of the Fallas festival figures in the street)

And more... 

To have a good impression of Fallas fireworks see this video by clicking here  from the website vuurwerkcrew.nl 

If you are interested in more after watching above video, you are able to get more at this page