We have heard earlier that there would be some kind of interface between Spore and YouTube to make posting movies easy. Electronista, in an article on YouTube APIs makes the following comment:

Electronic Arts’ upcoming life game Spore will let users capture video of their species and upload them directly to YouTube without having to leave the game, YouTube explains.

So it looks like you will be able to upload your movies directly from the SporePedia, making it much less of a hassle than saving your movie, exiting the game, and having to upload it through the YouTube frontpage!

UPDATE: the same news is also on the Official Google Blog

The YouTube integration will be there from the release of the Creature Editor already:

The creature creator is core to the Spore game experience, and seamlessly integrates with YouTube. It will be released within the commercial game and as a standalone free download for PCs prior to the game’s launch. We anticipate that millions of creatures will be created, many of which will be cropping up on YouTube.