Tim Watts wrote:

I just watched another of Matt Johnson's videos and it seems he buys the
"pixels" (individual light unit) ready made from a dude on Guanzhong via
Aliexpress.

Last year I added a PCB with 8 LED pixels to an aliexpress order, just
to see how easy they are to drive.

I found they were easy enough to drive from a USB-serial adapter
(admittedly a specialised one that can do sync as well as async) and
knocked up a little python program to run through a few effects, so I
bought a 200 pixel length of LED tape as part of another aliexpress
order ... now's probably the time to dig them out.