No idea which movie that is, but the music reminds me of sangre Cavallum. I like the primitivism of it - the celtic/medieval stuff can quickly become a bit too happy or new age-adjacent for my taste, but this avoids those pitfalls.
TMLHBAC were great, better than Der Blutharsch IMO, unfortunately the releases are sold at horrendous prices these days. I have all the CDs (doubles of a A New Soldier... and Rest..., both up for trade for similar stuff...), but not the vinyls which now seem unobtainable due to the pricetags. All the vinyl tracks are found on the Rest On Your Arms Reversed compilation anyway, so that's okay.
I saw quite a few of the big names live when they were on top and Triarii were among the best. I never really got onboard with them as home listening, though. Maybe I should dig out my old CDs and give them another go.
I'm not sure why, and perhaps it's just me, but it feels like the neofolk/martial movement is gainning a little bit of momentum at the moment after c. two decades of stagnation. I could certainly do with a revival/re-vitalization of that scene.