I use amsteel daisy chains on my light sticks and like them a lot. IIRC I lost about 1.5+ pounds (which is 25% of the weight of the full set of sticks) compared to the camlock straps by doing this, they take up much less room in my kit, as well as being quieter. I've found them to work easily and reliably over the past 2 seasons, and would buy the same thing again if I had a need. I also have a set of lone wolf sticks that I used to use 8mm cord with before I had the daisies--I dont know how to describe it but the cord is sized so if you crank it under itself in the versa button, it locks in place. Also quiet and lighter than cam buckles, but more fiddly and doesnt save much/any room over the cam buckles--once set it's very secure though, sets much more like a cam buckle strap. camlock buckles are easy and very secure, but for me the advantages of my other systems outweigh that (no pun intended).
re: the video--I havent seen the need for something like this. I always use a linemans cord when climbing up/down so even if a stick kicked out I dont think I'm in danger of serious injury. I also dont love the way that guys does that--dyneema/spectra (which is what amsteel is) has an extremely low melting point and cuts into itself even more than nylon does--so friction from running back through itself to tighten will significantly weaken it over time since that wear will be concentrated at specific points on the material. It's also extremely slippery and does not hold knots well, so I personally would prefer to rely on the loop over a versa button rather than any knot. In my former life I used to work for a manufacturer of climbing equipment and have done quite a bit of testing on various materials uses in applications similar to this, so this jumped out at me. It doesnt have to hold much more than body weight so it may not be an issue in most cases, but if you are worried about safety with the dyneema daisies, to me this danger seems every bit as-likely as getting hurt from a stick kicking out.