I spent a full day trying to manually upload my normally produced video to youtube. It kept on falling over after many hours of uploading. In frustration I decided to try the auto upload inside PD.
Well it worked and I must say the quality is quiet good. It uses .wmv 10.4 Mbps for 1920X1080. I normally produce to .m2ts 15 Mbps 1920X1080 (H.264)
You will get a better quality video manually producing your video if showing your videos on your 50" plasma but for Youtube I don't think I will worry about manually producing my videos in the future.
Here is the video if you want to check out the quality. It is gopro footage recorded at 920X720 4:3 aspect then stretched to 1920X1080 16:9 aspect in PD.
My youtube channel====> http://www.youtube.com/user/relate2?feature=mhsn