Purr, thanks for new info about that. However, I still have problems imagining what it looks like. I dance int. latin, that is different than rhythm anyway
First thing I would like to know is how steps are actually timed. For instance, in int. latin (rumba or cha cha cha), we generally place the foot on the beat and transfer the weight after the beat and this transfer isn't that fast (this is something like a general rule and written in the books). This way of movement seems to be transferred from cuban Son and other cuban dances in the past (I don't know exact history and it's not the point atm)
On the other side, in salsa (like in the clip I posted), usual way is to place the foot just slightly ahead the beat and do much faster weight transfer on the beat and release the other foot. As a consequence, body and hip movement is considerably different. Similar principle is used in some other dances danced socially among salseros. This approach was new to me and needed getting used to
Other question, at the very moment of actual weigh transfer, what is the position of the hips? For instance you transfer the weight to the left foot. Which hip is higher at exactly that moment - left or right and in which direction goes that movement (which side is going up and which down)
I'm not sure am I clear to you with these questions - if not, I'll try asking some other way
Thanks
Edit: I found a video of the couple you mentioned. Do you see something of that technique applied (probably not easy to spot, as it's not really something like a basic movement)