I noticed that too. That's why I included the title and verbal description from the original thread. Although I like mixing in joint locks (part of "qinna" in Chinese arts) with push-hands, the written description equating techniques from different arts based on a superficial resemblance is a common mistake. What is shown is quite distinct from DR-type locks that Dan or Howard would show, for example, or good Chen Taiji practitioners can demonstrate. Clear examples of locking up the skeletal chain are also shown in Tim Cartmell's translation of Zhao Dayuan's book, "Practical Chinna."
The application of the locks may leave something to be desired from a DR/Aikido perspective, but I like his position that techniques are just a result of working with whatever energy is offered at any given moment as well as keeping structure and balance in yourself while taking that of Uke's.