Your presentation is charming and useful! But just to point out something that will help you with future videos, the music here is clashing with your presentation, and competing for attention with your charming presentation-------making it nerve-wracking to pay attention to your lesson! Music and language operate on the same mental setup of mind... so be careful with background music. Unobtrusive background music, or perhaps no music at all, would be better. You could use music for transitions between segments of your presentation, if you like; then it won't clash with your presentation. The music in this video is alright as music; but the intense beat, or tempo, clashes with someone trying to listen to you talk about the lesson. The videography and the lesson here are otherwise superb! Chok-dee na krap!