itch.io

I hadn't noticed it was you, apologies for the redundant reply :P And thanks!

This is really late, but I am the artist behind that example song and I can give some context. I never put my music on the YouTube content ID system, but a few months ago someone had taken two of my songs and stolen them, trying to claim ad revenue on them. I eventually got the songs taken down from streaming services (thanks mostly to the help of another label who artist's music was stolen), but seems the content ID match is still in the system for some reason.

As for whether or not my songs are okay to use in a game jam, I guess it depends on the rules of said game jam. I'm personally fine with people using my music in their games as long as they're non-commercial, regardless of context; I've noticed a few games that have done that already in fact. But I also know some game jams require that all assets have a license that require commercial use, so I'd say just make sure any game jam you are in allows non-commercial assets for free games before deciding to use any Creative Commons music that doesn't allow commercial use.

Hope this helped!
- Gigakoops