The music is from an album called 'Raindance' which features excellent pieces of music similar to this.
The track in this clip is the title piece of music from the album. here is the track listing -
1. "RAINDANCE" 2. Return From River Island 3. Circle Of Fire 4. Intertribal Pow Wow 5. Thunder Cloud Mountain 6. Dance Of The Warrior 7. Seeds Of Future Happiness 8. Nighthawk 9. Honouring The Horse 10. Dance Of The Bear 11. Song Of The Harvest 12. Celebration Of The Young