I took a chance downloading an AMV that had only 300 hits since '02. But man, I am very glad I took that chance. Easily one of the best music videos I have ever seen, plus the timing, lyrics, and movement could not have been more excellent. Deedlit looks awesome too, and no spoilers, so it's very nice. The only thing I think detracts from making it epic is the silly closer at the end made up by the creators. Other than that, I beg you to try downloading this video and giving it a chance.
I viewed the picks that were reccommended above, and I must say that my favorite was Jonny Bebop's recc. for Agony of Existence by Red Eye
That video Screams Tension with a little Determination and had me thinking "28 Days Later".
I'd also reccommend Vegeta by Dark Kumari. This Video is a DBZ classic set to Linkin Park, but I think it's a top pick for determination and trying hard.
Yeah...a serious School Rumble AMV, and an extremely dark one at that. Very interesting take on the series, and even if you don't like metal I'd tell you to watch this video.