This is that dude's website if you want to reach out through any of his socials to inquire about what exact mount that is:
http://tv-presspass.com/But it looks like it's an AK or SKS clamp on light mount.
Personally, I would mount to my NEA rail, and I like my lights at 1:30 to 2 oclock on cantilever mounts (opposite side of support hand). Something like the older magpul polymer or thorntail would work. Main benefits are light doesn't jab you in the nether regions when you drop the slinged gun or even when just slinged tight to the body for hands work, allows you to illuminate with less exposure around barricades, and keeps hand space free on support hand side. The top mount also throws some light on front sight post (but less illuminated than target), and the cantilever reduces barrel/fsb shadowing. On a 16" barrel, unless mounting it way out, the shadow from a 6 oclock light mount is right where your target is at 12 oclock. 1:30 to throws to bottom left.