Video quality is absolutely FANTASTIC! Aside from the ads/commercials that you're forced to watch during each episode, this site it great.
Note: I am not sure what to make of this but this site does contain scripts from 2 adservers known for using tracking cookies: quantserve.com and doubleclick.com.
Watch every episode of South Park for free and get news straight from the studio at the official site for television series. South Park is an Emmy and Peabody award winning animated television series created by Trey Parker and Matt Stone