To fill everyone in coming to this page, I capture my videos (mainly all video games from Xbox 360) in High Definition. These are my output settings for sites such as mainly YouTube. These settings will work for you, you may need to change a few variables such as the frame rate and variable bit rate if mine is much higher than your source quality. But otherwise, you should be set and good to go. This page was last updated March 11th, 2010.
My Vegas Pro 9 Settings:
I no longer use Sorenson Squeeze for any of my videos. But if you do, these settings should be very useful to you for an output of 720p. Again as above, adjust the data rate to what you want or if you want 1080 on YouTube.
My Sorenson Squeeze 5 Settings:
Everything else default if those were not already.