Unlike print and tv ads, web sites don't need anything catchy/flashy. With a print/tv ad you need to catch someone's attention, with a web site the potential customer is already in the store. Your goal shouldn't be to drive them away with a confusing array of options and/or slow loading of flashing videos or ads.
No one needs to see a video of a plane flying or other animation. Just make it work. Yahoo use to have a nice simply home page but lately it is just cluttered with garbage. (And I forgot to mention those companies who think I need to hear music when I navigate to their page. Argh.
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