I'm not terribly familiar with PSP emulation, but those glitches look very, very minor compared to the sort you should worry about too much. May as well get a bit into the game to see if it does actually get worse right?
The blurriness could be a couple of different things. Bilinear filtering could be enabled, which would blur the fine details like that. If you're using a software mode plugin for video, that could cause it too. It could also be that its set to a low resolution, so it gets stretched out.
"I think that the problem with this video is it is highly derivative of many popular bands within the genre. Although when viewed on its own merits, it does have a deeper groove. However what it has in groove, it lacks in originality. One can't help but be reminded of such bands as Pearl Jam, White Zombie, Suicidal Tendencies and other bands that bear the mantle of so called "Alternative Rock". One is even reminded of Lorie Anderson when she wore curlers. Hehehmhm! This video speaks less to the heart and more to the sphincter. In closing, I think Korn would do well to learn more from -"