Yes, the second item is the one I believe he’s using, that we’ve discussed elsewhere. They aren’t that fragile, I’ve found. I still think they are awesome, and the 200 limit is really the only big negative. I wish someone would make closer spaced lights out of them, but I did figure out a good trick to reduce the wiring between: curl them (wrap around a small dowel/rod, and then slide it out, leaving a tiny bundle/spring that hopefully will help with spacing closer, with minimal light blocking in some cases.
The problem with the first one (and the ones @JustPete linked to originally from Adafruit, which are ultra expensive for no good reason) is that they are single sided circles (really tiny pcbs). For flat surfaces, or in a window, fine, but for 3d use, not really good, and putting two together (back to back) doubles your power requirements (you could fork the data line, so they’d mirror lighting wise at no extra FPS).
Or maybe someone will invent something similar to @wizard 's bullet clip for these, that will diffuse the light into a nice globe for cheap. (The premade ones I’ve made aren’t cheap). You can buy unsoldered 1 pixel PCBs (usually in unbroken PCB panels of 100) fairly cheaply, but then you have to add all of the wiring and solder it (6 solder points on each), which is not fun.