Basically, just watch every turn that he doesn't set a hard edge & uses a bit of a retraction turn, especially in the flushes & hairpins.
0:12, 0:19, 0:40, 0:46, 0:50. Then look at the time differential at the finish. I was at this race, & to this day I think it is one of the best runs of SL I have ever seen.
How does this relate to this discussion? I am sure there are better examples, but I believe these turns are the modern rendition of what Joubert described 35 yrs ago as the Serpentine.