This is one of the best armbar from mount video tutorials I have seen so far.
The armbar is a very high percentage submission that is commonly seen in combat sport such at BJJ and MMA.
Rafael Lovato Jr's teaching is very clear and to the point. He shows very good details. The fact that he speaks good English (as opposed to the non-native English speaking BJJ teachers) also helps a lot.
Check out the video below and let me know what you think:
If you want to learn more from this top BJJ practitioner and very active competitor, check out his website here. He has many instructionals on guard passing, top game and guard game. All are very well presented.