This is so, so cool - a combination of tablet and rigid heddle weaving.
The "rigid heddle" is made up of a stack of plastic "tablets". How they are combined determines what patterns can be woven. Basically the tablets make up the shafts of a multi shaft loom. Though you can't lift several shafts - or something.
Weben mit dem Weberknecht Webrahmen - Schal in Koeperbindung
https://youtube.com/watch?v=tzWZ2O3QEdc&si=oCuPkIRFax1wLIBo