Because this is a generic filename for a private or local recording, I cannot see the video or hear the music playing in it. To help you identify the "piece" of music, you could:

: Is it a classical piano piece, a fast-paced pop song, or an orchestral movie score?

: Use a music recognition app like Shazam or the Google App's "Search a song" feature while playing the video on another device.

Could you or tell me where you found the video?