The NullCo version is 128 variable AAC @ 44.1kHz (Original; obviously there's other quality options on YouTube)
The website version is V5 (about 78 max) MP3 @ 48kHz. It also contains Album/Track/Artist metadata, as well as embedded artwork. You can access/download directly here:
http://walledoffhotel.com/media/green-lines.mp3