Short Answer: Officially, no.
Wah Nam has been online since 1998 and was the forerunner for releasing form and power generation demonstrations publicly over the internet since 2001. Forms and power generation demonstrations are finally (and thankfully) all over the web in present day society. Long gone are the days of posting physical media via air mail anonymously.
However, with that being said you are still welcome to try your luck by asking. Sigung Andy Truong is friend and teacher to many, local and abroad. If you fall into either category of friend or student, then this would still be considered a polite question to ask. If you are neither friend nor student, then it would be considered impolite to ask this question.