That was fast!

Edit: its great to see the games they highlight with the cover illustrations. They cover a variety of genres and all look like quality games with interesting design choices.

Interesting to see the doom recreation. The commentary in the subtitles is fascinating.

MPL is a weak copyleft license.

If they make changes to your files then they have to share their changes to those files with a reciprocal license.

It has no impact on the licencing of the rest of their project.