The submission link is a MIDI rendering of the two passages to the best of my recollection; if it is the same piece, the two sections don't actually run into each other like this, but I only transcribed what I could remember without speculating too much. The first part I'm quite confident about--might even be the correct key. The second part is more tenuous (hard to hear it clearly in my mind's ear because it's lower in pitch and the intervals are larger compared to the little chromatic enclosure of the first part) but I think I captured the contours of it.

I heard these passages in a video at some point but I can't for the life of me remember the piece or composer (I'm not well-versed in classical/romantic music) and looking for "famous piano octave runs" or similar didn't bear fruit. Any help would be greatly appreciated!