The showing of feet and their position is important to analyze the progression in their relationship. Body language is an important indicator in signaling internal stability and thoughts, and your interest level in another.
In episode 3 (the first picture) by the placing of Victor’s feet in between Yuri’s, and Yuri’s passive stance, you can tell that Victor is the more dominant, confident, and alluring one. He has no problem with breaking space barriers or asserting himself.
This is something we would have never expected from Yuri in days of past, yet as we can see, half a year later, in Episode 9, the roles have been reversed.
This time it’s YURI asserting himself. He has his feet in between Victor’s stagnant legs. Yuri initiated the first movement. This time Victor is the one timid, unsure, and frightful and/or hopeful even. Yet Yuri finally knows what he wants, and he has no problem with asserting himself, being confident in himself, and TELLING Victor what he wants from him.
That’s seriously character development for them both, it makes them so much deeper!!