Getting the practice just right seems to require personal connection with a master for whatever reason, but Sam Harris does a pretty good job of communicating the essence of it here: https://www.youtube.com/watch?v=kSPWiEaOlfc. There are also lots of resources you can find online, though I can't say I recommend any one in particular. It is the kind of thing that requires a precise fit and the right conditions.
There seems to be an endless variety of Pointing Out / Rushen instructions in Dzogchen. Some work better than others for individual meditators. But personally I feel there's a strong placebo component to it as well. If you come in with a) good baseline concentration, b) an expectation of receiving real wisdom from a guru that you are in some awe of, you might be much more receptive than someone who stumbles into such a thing and treats it as another tourist attraction. The Pointing Out experience seems like a kind of hypnosis session; it matters how receptive you are at the moment.
Personally I don't think there's anything to the Dzogchen psychic connection its adherents claim you need to establish with a guru to experience the real thing. It's just woo woo influenced by Shaktipat from Hinduism.
In my opinion one of the best Western teachers is Loch Kelly. Although he doesn't call it Dzogchen, it seems to be pretty much the same thing and without the maddening obscurantism of Dzogchen texts translated to English. He has a lot of videos out but I liked this (paid) Vimeo course: https://vimeo.com/ondemand/lochkellyhow/
While Dzogchen texts are certainly obscure, the proper realization of Dzogchen does entail a transformation of one's understanding of reality in a way that our culture would certainly find "woo woo." I would guess that Sam's aversion to such possibilities is what prevents his own practice and understanding from getting to that level, but this is just my own conjecture.
