What an enjoyable video ! I think your romantic playing is growing in mature sentiment; mind you, it was always pretty good.
I had not realised the extent of your musical background. Can you tell us, at least naive and untutored listeners like me, did Rachmaninoff consciously employ these "methods" during his acts of creation, and how exactly did his creative process take place ? Did improvisation play a part in it ? I can see how people can construct all sorts of descriptive theories about music but they are frequently not constructive theories in the sense that the composer actually used them as such.
As to the yearning for some "other place", which does seem to be a subjective characteristic of late romantic music, and which we were discussing in previous posts, perhaps it does not matter whether the impulse is grounded in reality or some imagined state.