It’s what’s known as an AMV – an “Anime Music Video,” a fan-made music video for a song made up of clips from Anime (sometimes one series, sometimes multiple series with a common theme). The song is by Modest Mouse and it’s called The World at Large, and the anime it draws from is called Kino’s Journey. This one was made by a person who goes by the name of Kwasek from a group called More Than Toast.
It’s a very well done video, and there’s something about it – about the music and the theme of Kino’s Journey, paired together, that always hits me in my “sentimental center.” It is a very moving piece of work.
Give it a watch, I think you’ll like it (and turn up your sound – the music is absolutely fantastic).
If you want to download the full video (rather than watch it on YouTube) you can get it from AnimeMusicVideos.org.