Did a little test just now to make sure it works. Here's the code I used:
BVH bvh = new BVH("dance.bvh");
BVH.animateSkeleton(GameObject.Find("MySkeletonGOName"), bvh.makeAnimationClip());
1) I used MakeHuman ( http://www.makehuman.org/ ) to make a model. I exported in mesh format "Collada (dae)" and made sure to select the Bone Orientation Option "Local = Global" (important/required since it makes sure no joints are rotated).
2) I imported the .dae file into Blender ( https://www.blender.org/ ) and made a little animation. I exported it to format "Motion Capture (.bvh)" and checked the "Root Transform Only" option (it isn't required but I really recommend it since it makes the BVH file smaller by removing positional data usually not used).
3) Made a new scene in Unity, it imported the .dae file automatically. I dragged it into the scene, opened up the model GameObject in the Hierarchy and renamed the skeleton GameObject to "MySkeletonGOName" (just so I can use GameObject.Find()). The skeleton is the one that only contains a bunch of transforms.
4) Made a new MonoBehaviour script and put my two lines of code in its Start() method. Could have been one line of code btw, the bvh variable isn't really needed in this case.
5) Pressed play and the model made by MakeHuman danced via the BVH animation made in Blender. It works!
Blender Tip: If you go "Export > Collada (Default) (.dae)" you need to check "Export for OpenSim" under Armature Options. It removes bone rotations so that the skeleton joints become compatible with BVH. So you can create models from scratch or modify the mesh of existing ones if you want to.