As per the youtube support pages (dated 7 April 2011)
Hello YouTube live streaming partners!
As you may have read, we're gradually
rolling out our self-service live
streaming beta platform to partners
with accounts in good standing (no
Copyright or Terms of Service
strikes). The beta platform enables
partners to stream live from their
channels at any time and schedule
events ahead of time to notify their
subscribers.
In order to ensure a great live stream
viewing experience, we plan to roll
this offering out incrementally over
the course of the coming year. If
your account is enabled for live
streaming, you’ll see a promotion when
you log in and visit your channel
page. We know many of our partners
are excited about the possibility of
live streaming on YouTube. If you
find you have not been enabled, we
welcome your enthusiasm but kindly ask
for your patience. There is no
process for requesting live streaming
for your account - just make sure that
your account is in good standing and
that you remain an active uploader who
respects YouTube’s community
guidelines. We’re working hard to
enable the feature to as many partners
as possible over the course of 2011.
Thanks in advance for your enthusiasm,
understanding, and patience.
For partners who are enabled, please
use this forum to post questions and
issues you encounter, as well as
feature requests for funcitonality
you'd like to see in the product. The
team will monitor the forum to address
issues and solicit your feedback. We
also hope that as you become more
familiar with the product, you can
help each other to solve common
problems.
Thanks for participating! We’ll
continue to update this forum as new
product features are released.