Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link:  https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100286

MacLeod's description:

Genre: Silent Film Score
Length: 0:52
Instruments: Tuba, Percussion, Clarinet, Trombone
Tempo: 116

Tuba carries the character of the piece. 034
ISRC: US-UAN-11-00286
Dark, Bouncy, Humorous 2006