It is such a beautiful piece that you just cannot stop replaying when you are in the mood. I learned this piece, Nr. 7, Träumerei, is one of Schumann's best known pieces; it was also the title of a 1944 German biographical film on Robert Schumann. Träumerei is also the opening and closing musical theme in the 1947 Hollywood film Song of Love, starring Katharine Hepburn as Clara Wieck Schumann. 

This piece was originally composed for piano but the first video played as a violin romance, which is so beautiful. The second video played by an orchestra, which has more modern taste, but I feel it is a little bit off from R Schumann's romance style, which is quiet, sweat, romantic, just like the 3 Romances for Oboe and Piano. The third video very beautifull played by Horowitz as originally composed. I like it.