Xonotic: Trailer

Just how do you know? Nobody asked, that's all I meant. If just a couple of people in that group have an interest in supporting OSS software, and if the inquiry is received by such a person, chances are that someone that is entitled to do so will say, ok use it I don't care. If you don't try you cannot say it won't work. I don't think it is probable that the thing will be licensed for free for this trailer but it is not impossible. Especially since nobody is using their hard work for its own profit, but for a non-profit project. Nobody is making money off their hard work here.

Besides, what harm could it possibly do? I am not sure Fisume could be forced to take the trailer off the web but maybe he should do so before asking just to be on the safe side. Apart from that there's nothing to lose that cannot be lost if they coincidentally stumble upon the trailer by themselves, and I'd suspect the reaction of the IP owners would be different if they detect a possible infringement by themselves than if they are being asked kindly if they would mind.