Nora the Piano Cat with
the Klaipeda Chamber Orchestra
conductor/composer Mindaugas Piecaitis
Clips from Nora the Piano Cat videos which first hit YouTube in 2007 are spliced together and accompanied by an orchestra playing a composition by Piecaitis.
What is unclear is whether the splices were created to fit an already existing piece or one composed for Nora's compositions.
Either way its amazing.