This is a student project rather than a produced video, and it is presented as such: the description says it is a mix of all the footage taken, playing at eight times the original speed. The result is closer to a lab notebook than a tutorial — you see the setups that did not work alongside the ones that did.
That has its own use. Polished build videos hide the iteration, and a tonoscope is a device where small choices about membrane tension, powder type and tube length change the result completely. Watching someone cycle through those choices at speed is instructive in a way a clean single-take build is not.
Set expectations accordingly: no narration, no parts list, and the eight-times playback means you will be scrubbing back. Worth it if you are at the stage of tuning your own membrane.