Verbatim makes two distinctly different types of blu ray media. One is the regular inorganic recording layer, and the other has an organic dye layer. The one with the organic dye is designated LTH (low to high) on the packaging.
The LTH disks are a little less compatible across burners, but they really should work in a BH12 series burner.
I suggest saving your video on the hard drive, then use ImgBurn to do the actual burn to the disc. ImgBurn is a free program found here: www.imgburn.com
We are also much more familiar with error messages and other types of information that can be gleaned using ImgBurn, so if you still have problems, we should be able to help.