This tutorial contains a lot of tags, drawing and editing, and the main thing is that it shows you how to turn a tag into a piece.
Posts Categorized: Videos
This tutorial features loads of live action spray paint and tips direct from a graffiti artist on how to improve your skills.
A short but good tutorial on drawing graffiti letters from DKDrawing.
Ten super-awesome new graffiti videos for June 2014.
10 super-duper-awesome graffiti videos for April 2014.