Woodward in 2016 indicates that there were multiple experimentalists replicating the initial experiments.
Most of the videos are from the Sept 2016, Breakthrough Propulsion Workshop.
Woodward is convinced it is proven, replicated and will scale to fast interstellar travel. It will take some decades to achieve but the effects are their and replicated. Various scaling like higher frequency will improve it by somewhere between the square and cube of the frequency.
It is complicated so there is a lot of work and experimentation to do.
They need to get from 36 kilohertz to about 2 gigahertz for true interstellar vehicles.
Woodward also says George Martin has a Mach effect propulsion device working.
Breakthrough Propulsion Workshop 2016 in Estes Park, Colorado had many presentations of Mach Effect, EM Drive and related technologies.
To read more and view the videos, click here.