They are Chinese tapping techniques that stimulate harmonic flow to strengthen weakened organs. It does give results and must be performed consistently for 3 weeks to notice improvement.
The tapping is not along meridans or points I’m familiar with; my knowledge is pretty limited and practical though. Also, for the tinnitus technique precise location does not seem to matter, just the sound; it is a very gentle tapping also and , not the sort of acupressure technique one would use in Chi Kung (Qigong).