Watch the Angled In and Angled Out Position online guitar lesson by Andrew Leonard from Beginner Method for Classical Guitar
The final two left hand classical guitar positions are angled in & angled out. These are names I created to easily describe how the left hand's third and fourth fingers are positioned in relation to the neck of the guitar. First, I discuss angled in and at approximately 1:45, angled out is introduced.
Now that all four left hand classical guitar positions have been explained, here's a brief summary of their usage. If you're playing one note at a time, most of the time you'll be in parallel position. Transverse position is used when two or more fingers are on the same fret. When two or more left hand fingers are used, but not on the same fret, you'll be in either using angled in or angled out position.
The next set of videos: Chordal movements and the Milan's "Pavan 1" chordal passage give you a very detailed explanation while playing music.