Okay. What was the style/form of the SanZhan you were taught? I ask simply so I may know from where you are coming from.Sanjuro_ronin:
Well, that was how I was taught sanjan so...obviously I like it because of that
That aside, to me and how I was introduced and taught sanjan/sanchin/samchien/sam boo jin was that it was a development form and that it was to develop the muscles and ligaments with a combination of dynamic tension and explosive "jing".
Depending on the system ( or even the training being done at the time), one prioritizes one aspect over another of makes them "equal".
In that clip, that is what I see.
But of course I may be bias.
If I'm not mistaken the SanZhan on that clip is from the Wen (Ong) Gong Shr Wushuguan of the Pan family. As such their are some slight differences between this line and the line of Master Su YingHan.
The Pan style seems somewhat more externally focussed perhaps even static and ballistic in its expression whereas the YongChun version of Master Su Yinghan is somewhat more connected (at least that's how I see it but then I'm certainly no "expert" nor do I claim to be!). I guess at the end of the day it all comes down to a matter of perspective and what you are seeking to take away from the form.