The first is a video interview from the documentary "Art of the Piano" Benno discussing his initial meeting with Rachmaninov approving of his performance of his favourite piece - B Minor Prelude.
The second is a radio interview, from the Panorama show, on the theme: "Reminiscences of Rachmaninov", it is most likely recorded in the USA.
And part II. Some highlights:
- Rachmaninov was an advocate of slow practice
- His own technique had to be adapted, even employing exercises from Czerny when he became a concert pianist late in his life to prepare to play the works of Beethoven, Chopin, and Schumann.
- Rachmaninov recorded his transcription on Mendelssohn: Scherzo from 'A Midsummer Night's Dream' 14 times and wasn't satisfied with any of the recordings. Moiseiwitsch and the presenter argue it was the stress or pressure of recording the piece on deadline which affected the performance (hence how relaxation aids performance). Read Rachmaninov's thoughts on the whole recording process in his interview with Gramophone magazine in 1931.
To know more about Moiseiwitsch, behind the scenes, here's a transcript of another interview from what I assume are notes from his Arbiter Records recording label in 1959 (pre-cd days). It covers his outlook on life and reflections as a concert pianist. Here's a 1950 article "Playing in the Grand Style" with which he refers to playing in the grand style of Anton Rubinstein, Rachmaninov, and Paderewski.