Bleisch - 26 Kleiner Irrtum.mp4 Link

The title and file extension suggest this is a digital recording (track #26) from a collection of his works.

The piece you are referring to is likely "Kleiner Irrtum" by the Swiss composer . Bleisch - 26 Kleiner Irrtum.mp4

Under the artist name Key , you can explore the Piano Waves single or his instrumental collections. The title and file extension suggest this is