Re: "Twenty years of booting up your—BEEEEEEEEEEEEEEP—Dreamcast."
He's not talking about it being slow...
The VMUs (Visual memory units (aka memory cards)) are pretty much mini gameboys - they have a screen, D-PAD, A, B, start buttons and though not used much could be used to play games.
This meant they needed their own battery, which was a cell battery, like you might find in a clock.
When the battery has run down, starting up the Dreamcast provides power to the memory card and it beeps loudly as it turns on.
As almost no-one played any of the very few little games, no-one bothered replacing the batteries. So all Dreamcasts make a loud beep when turning on.
Especially mine, which has three of them :-P