I’m not exactly sure what you’re trying to do, but if you just want people to be able to view a movie/sound file as it’s downloading, you can still use QuickTime even without Streming.
If, when creating your QuickTime files, you make sure they include a hint track, then they should play as they download, even over HTTP. It’s not exactly the slickest way to do things, but you can embed a play-as-you-go file in any page simply enough.
If you really do want to do streaming, and not “pseudo-streaming” (my stupid word) via the HTTP protocol, then I don’t think you’ll do any better with MPEG (or Real or Windows Media for that matter) on your DreamHost plan–as far as I can tell, the basic plan includes data transfer via HTTP only, which is going to treat all media files the same. The only difference is what the player does with the incoming data.