I didn't shift the discussion.
In post 7, I said:
When you train Taiji "採 pull to the right" and "挒 pull to the left", you will feel that something is missing there. What's the missing part? The missing part is the leg skill. When you pull your opponent to your right, if you use your right foot to block his leading leg knee, you can take him down effortless. Why that kind of leg skill doesn't exist in the original Taiji form? I can only say it might be taken out by some "Taiji for health" people in our previous generation, or the generation before that.
I said the "leg skill" for "採 pull to the right" and "挒 pull to the left" is missing in the Taiji form. You then respond me with a video. In your video, the leg skill is still missing. The person applied "採 pull to the right" and "挒 pull to the left" without using any leg skill (0.20 - 0.22 and 1.12 - 1.14).
Your video just further prove that not only leg skill is missing in the Taiji form, Leg skill is also missing in the Taiji application.
The leg skill is missing in the Taiji form. This is a fact. No "internal" training can fix that missing training issue.