If you're a beginner like the Asian looking man in the above video, then you have no business grabbing a weightlifting bar. The starting point (and no this is not some silly joke), is a broomstick. Every weightlifter (even the elite ones) have their own broomstick. The only difference between the beginner and the elite is the purpose of owning a broomstick.
For the beginner, it's about repetitiveness of the same motion, a thousand times over and over again before moving up to a 20kg weightlifting barbell. Basically take a week (a full week), where the broomstick becomes an extension of your limbs and nervous system, where you finally (at the end of that week), you simply move on autopilot/100% automatic.
Some will laugh, whilst others might feel the need to ridicule what I've written above, but I've yet to see a baby walk before they crawl.
At about minute 19 onwards in the above video, the instructor begins to talk of a split between two phases of the lift: phase one then phase two. He asks the lifter to pull his shoulders back upon reaching phase two of the pull. Doing so (in my opinion) would result in the bar being lost behind the back once in the squat position..., especially in the snatch lift.
The instructor seems to take things way out of context when mentioning (or putting down) the hip thrust, which in my opinion is the most crucial element as the second pull, (bar above the knees) is reached. He believes that lifters who thrust their hips forward, would cause the bar to suddenly lose its path in front of the lifter. That is not true at all, and if I continue writing, I think I'll be writing for another hour. So how about I'll answer direct questions on the Olympic lifts if anyone is interested.
Thank you.