Can Anyone tell me what this CSS/HTML code means?

The <div style="ETC"> code starts a DIV. This is a block of text, code, pictures, or whatever.

The "width: 1px; height: 1px; overflow: hidden; text-indent: -9999px" sets how the DIV looks. In this case, it's one pixel wide, one pixel high, it's texual overflow setting is set to 'hidden', meaning any text that doesn't fit in the DIV will disappear. It then has an indent of 9999 pixels to the left [rather than to the right as usual].

Then there is an EMBED tag, which sticks an applet or plugin or music/picture/movie in the page. The "allowScriptAccess="never" allowNetworking="internal" enableJSURL="false" src=http://../css/piAF2iuswo.mov /" mess is the settings for the EMBED tag. From what I see, it's a movie.

That is the best I can glean from the code. It looks like a hack to me, but I can't tell without context.

locate the h1 tags on your html document someplace. there could be some types in the tag that starts off off with types. as an occasion types margin, 0, a million,5, a million,5,0 <types/> that area may be the form. so u shud replica that or there could be seperate type sheet in the document itemizing that has all the CSS on it. look for a checklist that maybe called types.css and you will locate all types in that checklist.

Yes.

Hypertext Markup Language (I think thats it) is a sort of computer language used to create websites.

Cascading style sheets (I think that's it) are like html, but they control how the page looks, like the colour and size of the text, the background and even the scrollbar.

If im correct this is a movie. There is very small text by the movie.

that is not HTML irt's look like CSS

no ☺