Is there some way to disable the loading of a quicktime video until the user clicks on it? I don't want the video to start loading slowing down the user's browsing speed.

Hi,

certainly not in iWeb itself.

You could add an HTML Snippet with an image link to the movie

<a href="URL of the movie"><img src="URL of the image"></a>

so when people click on the image the movie will load but that's probably not going to work for people using IE.

Otherwise you would have to use a player like this one:
http://www.longtailvideo.com/players/jw-flv-player/
but you would also have to convert the QuickTime movies to something else for that.

I currently don't know any other way, if you find out please tell me.

Regards,
Cédric