According to Apple Insider, direct YouTube uploading will be built into the upcoming version of QuickTime, which will ship with OS X 10.6.

According to beta testers, a variety of video-sharing options will be embedded into the latest release of Apple’s media playback and editing software, including the capability to upload to YouTube. You will be able to convert and upload any supported video file type to the online video giant. You also will be able to seamlessly upload supported video to the MobileMe Gallery.

Additionally, iTunes will offer ways to convert and export video files to work on iPod, iPhone, or Apple TV. All of these options will be available from one location and automatically be imported to iTunes before being synced to supported devices.