A soap film on a speaker is the thinnest membrane you can drive, and it shows Faraday-type surface modes that a rigid plate cannot. The catch is that a bubble is nearly invisible without the right light, and this video is explicit about the solution: two rings above the vessel, one coloured and one white. The description also gives the film recipe — water, glycerine and soap, mixed for durability — and notes the torus form was produced at 30 Hz with the volume balanced by ear.
At ninety seconds it is a result rather than a build, but the two variables that matter most for anyone attempting this — film chemistry and overhead ring lighting — are both stated.
The channel states there is no CGI and no computer, only a camera. That is worth flagging in a field where a lot of similar footage is rendered.