Source Hammer - Optimizing Portals

Optimizing a map's portals. Not area portals, not world portals, not Portal 2, just portals. I've seen a lot of mappers struggle with this so I've made a video to clear it up. The map comes from this game: http://doubleactiongame.com Now that I've done this video I've finally found some other videos on this topic: http://www.youtube.com/watch?v=2H4US-t1SbM Reason I didn't find them before is the keyword was "func_detail"