Hi, thanks for these suggestions. Sorry for the delay in replying.
These deeper martial arts topics are not as popular with the larger mainstream audience, and some of the topics are even "niche". The length of these DVDs, coupled with the smaller audience, makes it hard to justify the expense. Some of the shorter DVDs may be converted over time.
I appreciate your feedback and am really glad the video apps are working for you.
David Silver
YMAA Video Director
https://ymaa.com/publishing/app
"Avoid Prejudice, Be Objective in Your Judgement, Be Scientific, Be Logical and Make Sense, Do Not Ignore Prior Experience." - Dr. Yang
http://www.ymaa.com/publishing