Not much, I mentioned to him that I'd prefer people don't modify my content without asking permission (or at least publicly so). He took the video down.
Not a big deal, and I get there's nothing I can do to stop it, but I'm not a fan of people badly modifying content and displaying it publicly, as it can often make the original content look bad (or the modder) if the changes made were not made clear. That's why I asked on the download page not to do so, and obviously these wishes were disregarded.
Many thanks for the clarification If he don't show your mod out of the box I'm on your side