Well Just to get this started I will post 2 MMA highlight videos, the first his "Empty Houses" and is some of the best knockouts in MMA history
The next is "Furious Angels" one of the best MMA highlights out there, and shows the pain of defeat along with the greatness of victory.
http://www.dailymotion.com/relevance/search/furious+angels/video/xzxh3_furious-angels-hl-by-boondock_sport