I heard "Start of Something Beautiful" by Porcupine Tree on the (internet) radio today, and was again struck by how brilliant the song is. One of my absolute favourite songs ever, I think. Here are a couple of youtube links for it (though it should really be listened to with far better sound quality to do it full justice...).
Youtube (the eternal source of all media) features a video where the sound is from a live version, but with images that contains no live footage, but rather the movie that is shown above the stage when the song is played on concerts:
I find the full song totally brilliant, but especially the last half of it (starting around 4:15) I find just mind blowing.