Here is another way I decided to try filming with my Trijicon thermal units.
This method is not unique as it simply used the video output of the thermal unit. I bought a DVR from Amazon and used a USB power pack to power it.
I had to figure out the pinout of the 9pin Fischer connector to make a cable.
I then cut two pieces of Oak one to hold the thermal and the other to hold the DVR. I used a torque hinge to join the two pieces. This allows me to change the viewing angle of the DVR. I installed a weaver rail along with a spacer to the one piece of oak to attach the thermal. The battery pack is on the reverse side of the DVR.
This is now similar to a video camera setup.