Good news indeed.  I've had to have people add such licensing information in the description under videos for the few emails I've received in the OTRS system wanting to get permission for a transcoded YouTube video or a still image from one.

-- Adrignola

On Thu, Jun 2, 2011 at 12:38 AM, Samuel Klein <meta.sj@gmail.com> wrote:
Great news for people looking to find appropriate video for illustration.   SJ

---------- Forwarded message ----------
From: Alex Kozak <alex@massthink.net>
Subject: [FC-discuss] YouTube and CC BY

Hey all, I'm pleased to pass along this news: Starting tomorrow at 9am
Pacific time, YouTube will offer the option to license videos with the
Creative Commons CC-By-3.0 license, and will introduce new remixing
options in YouTube's cloud-based video editor