Scheduled downtime? In today's world?

This is what I saw just now.
This is not supposed to happen in today's always on...always connected world, is it? Agreed that this is not a "business critical" or "mission critical" service, but that is the case with most services on the net.

How does the entire service go down?

Haven't seen that happen with a Google, Yahoo or MSN service before!

Update: It could be because of this recent news announcing "YouTube in deal with Verizon"

Update 2: After more than an hour, YouTube is up again...