Have you seen their older videos? They had to hold back any criticism, and everything was mostly peachy. Now, the gloves are off, and they do have an ax to grind, unquestionably. However, just because they have to respond to tons of wumaos and tankies doesn't mean what they say isn't true. Furthermore, they do not pretend to be journalists, so I don't think this criticism has integrity.
Their experiences living in China line up with mine.
I haven't seen an instance of them compromising their integrity.