I haven't watched 'restropo' beyond the first 45 minutes or so, so I cannot attest accurately as to the exact device, but offer what I used and have seen as an older FO(13F)
In 2005, on an OP, I saw an Iraqi guy get a blowjob from his wife in the field by his house (at night) and then he sent her inside and took a shit. At 600 meters, it was very well detailed. If I'd had a video camera with me, it would be a YouTube hit.
That particular OP was fun. It was in an overt location and was more for denying movement in the area than being sneaky. We would use the LRAS3 to quickly find stray dogs and get exact distance to shoot them. Good times.
Here is the view the user sees: (blacked out the screen info for those guys that like to scream OPSEC about trivial crap). Distance was 660m. Object in view was the Golden Mosque of Samarra. Taken in 2005.