here is live audio (the video overall wasn't great) from a concert last week. it is the second time i played this huge Sonata in public, there's a few hiccups but overall i think the whole gist of the piece is there. i was asked to learn this Sonata, otherwise never would have thought about it, because it's so long and involved, it takes a lot of work to get all the details down.
i realized that rachmaninoff's technique even in the heaviest passages almost always involves intricate fingerwork, it is rarely pure arm technique as you see so often in liszt.
this Sonata is so fascinating because he wrote it for himself to play on tour in the USA in 1909, alongside the third concerto; it is musically based largely on the Dies Irae, and the climax of all three movements happens when the DIes Irae actually emerges twice in the last movement. the slow movement has some of his most intense lyrical writing, the first movement has incredible changes of texture, everything is planned and thought out, but its just so much involvement and length that it is rarely played.
howveer let it be known that this Sonata is one of rachmaninoff's all time great constructions, and the deeper you go the more rewarding it is ! the 2nd symphony, Isle of the Dead, 3rd concerto, and this Sonata were alll written in the same time frame.