Check 2nd link in my sig to see examples.
AVRevenue - Clips from Brutal Asia, My Cute Asian, and JavHQ. Long clips, Asian Niche.
http://www.avrevenue.com/track/NTIwODo4OjM/
Not quite 4 minutes, but I love the clips. AEBN Previews for mainstream movies.
http://www.aebn.net/index.cfm?refid=...&salesToolId=4