Most plate builds treat the amplifier as a black box you buy. This one does not: the drive chain is a speaker and an amplifier stoppi built, and the full write-up including the circuit lives on his homemade-physics site, linked from the description. The video itself is five minutes of the plate running through frequencies.
It is in German, titled both ways as "Chladnische Klangfiguren", but the visuals and the circuit carry it if you do not read German. The channel's broader catalogue is home-built physics apparatus of a fairly serious kind, which is useful context — the plate here is one instrument among many rather than a one-off novelty.
If your own rig is stalling because the consumer amplifier you bought clips or rolls off in the low bass, this is the direction to look in.