Here is a link to a video of the presentation I gave at the Linux Graphics Meeting in Leipzig in 2014:

Edward Trager: Hariphunchai: Designing a Tai Tham Unicode Font – LGM 2014
https://www.youtube.com/watch?v=h13-gBKdaXo

If you would like to just read the presentation on your own, here is a link:

https://docs.google.com/presentation/d/1cbyVkXxnVQGVIFnwqdud7MJUr7D7rDN9...