Quoted from the official video description:
Psycosis made a Crash Bandicoot mashup album, but he didn’t even bother to use all of the tracks. So, I took it upon myself to finish the job.
Mash Bandicoot: Bonus Round is a free album consisting of 14 mashups, featuring music from the first Crash Bandicoot game!
It can probably also be locked on to the existing Mash Bandicoot to create Mash Bandicoot Complete Edition. I think. But don’t take my word for it.
Be sure to explore the interactive world map!