LMMS is a free, open source digital audio workstation first released in 2004, originally called Linux MultiMedia Studio, and widely used by beginners to compose loops on home computers. This clip appears to be an original user upload sharing a first attempt rather than a song from a film, game or chart release. Short homemade tracks like this circulate on soundboards because they are easy to reuse, loop cleanly, and add music without lyrics. That makes them handy for quick edits.