was the converted file a flv file? Did you use/have "Flash CS4/5/X Professional"? In this case you can add a video to your website and generate advanced HTML code, which supports full-screen playback of video.
thanks for the reply. The file was originally a avi file, I can convert it to flv, and did indeed try that.
I'm using DW MX 2004 however (probably should have mentioned that before) but I do have Flash MX 2004 as well. Can I use that to generate HTML for the website?
I'm sorry, these programs I don't use/have/know. BUT I believe they are used in a similary manner. All what I could do for you at the moment is to give you some links (one of them is a German Adobe website, translated by Google). Here they are:
Another expedient possibility for you would be to post your question in Adobe's flash forum http://forums.adobe.com/community/flash.