Mastodon - Blood And Thunder

Perhaps one of Mastodon's best kown songs, "Blood And Thunder" has everything to be considered one of Metal's greatest anthems: iconic riff, powerful vocals and even lyrics based on "Moby Dick".
Here is the official video:

Baroness - Take My Bones Away

Baroness has just released a new album, "Yellow & Green", and "Take My Bones Away" is the first single. Great song and great vídeo.
Check it out:

Anathema - Judgement

Anathema is a very hard band to label. Fusing elements of Doom Metal, Gothic Metal, Progressive Rock and Alternative Rock, the band generates an unique sound with an atmospheric vibe. Once again, it's very hard to describe their music. I'll give you the song "Judgement", since it's a personal favourite.
Here is a live rendition:

Periphery - Make Total Destroy

Progressive Metal band Periphery has just recently released it's second album: "Periphery II: This Time It's Personal". "Make Total Destroy" is the album's first single.
Here is the official vídeo:

Steven Wilson - Harmony Korine

Another great song by Steven Wilson. I'll show you two versions: the studio version with the official videoclip, and a live version taken from Steven Wilson's new DVD "Get All You Deserve" set to be released on the 25th September (both videos directed by Lasse Hoile).

Pink Floyd - Shine On You Crazy Diamond

One of Pink Floyd's most recognizable anthems, here in it's full studio version (all parts included).
Enjoy: