I have added some instructional videos to Youtube as a supplementation to the article I wrote "How to play the Thavil" http://d.hatena.ne.jp/uchuuyarou/20130606/1370499234 . Here I have to stress again that although self education should be strictly avoided as with any other Indian classical instruments, I am putting this video as a memorandum for there seems to be no English nor Japanese information about how to play the thavil on the web at all
How to play the thavil, 1 "Tha Di Tom Nam"
How to play the thavil, 2 "Tha-KiTa KiTeTaKu"
How to play the thavil, 3 "Tha-KiTa KiTaTaKu TaKaJoNu KiTaTaKu"
I am now gradually working on subtitles and more new vidoes to add.
Please leave a comment if you have any questions.