Here is a Snatch and Clean & Jerk technique tutorial featuring 4 Russian masters of sports.
Maybe we can get a time stamped translation /summary going.
Snatch Video, 90 min
Clean & Jerk Video 68 min
Vadim wrote in saying:
One thing that was very useful for me in the C&J video was that you have to wait till you get on your tiptoes and only then proceed to the split.
Rushing the Split is the worst mistake in the Jerk
A good tip is to view the jerk as a two-phase movement, consisting of the initial drive to the tip-toes, and then receiving the bar with the split.
Almost all beginners just go straight to the split, trying to be “faster”, which results in poor Jerks.
Here is a link to the moment in the video where the blue shirt guy again emphasizes the importance of finishing the jerk drive and only afterwards switching to the split motion.