Can't answer your question per se, but to enlighten about that particular capo. It's a SPIDER, and can be used on just about any guitar, including, obviously, bass (Up to 6 string!). The idea is that it can, if so desired, capo as many or few strings as necessary. For instance, if one wanted,say, the E and A on bass to remain as open low notes, but needed to capo 5th fret on D and G, it could be set up thus.Then one could have effectively different tunings. Why, I'm not sure, as if one wanted to play E open and G# and B on the top two strings, one could do it anyway.And if one wants to play high up, one maybe should be on a guitar... bottom four strings, with a capo should one wish to go even higher.Frets may be too narrow then, though.
The most rudimentary capo for guitar is a pencil and a rubber band. A bendy pencil works best on a cambered fingerboard.Googling 'capo' brings up all sorts, mostly doing the same job, but some in very ingenious ways, like the G7 - how does that work then ?
After listening to the gorgeous playing in the clip, I wonder what the capo was doing. If it moved everything up one fret, why bother. If it was to re-tune a string or two, why not just re-tune a string or two? Or did I miss something? There is a probability that the 'teeth' can be flicked over to produce a different tuning, not sure.