Is there anyway to replace the boot screen with a video?

You're referring to the black screen with the green loading bars? I believe something like that is a tad impractical, if not impossible.

Besides having to wait even longer to get into your machine, no you cannot do this.

you can replace the boot screen but not with a video. there are programs out there that will change it. but it is risky so make sure you backup the original boot screen or If it does go wrong just insert your OS disc and repair the startup.

ahhh well thanks anyway.