2-finger exercise for shifting, vibrato, sound production & high positions [violin technique]

Picked one by one from a mixed channel; title passed two strict editor passes and the clickbait rules.

A 30-minute video from Daniel Kurganov, Violinist: “2-finger exercise for shifting, vibrato, sound production & high positions [violin technique]”.

Video by Daniel Kurganov, Violinist, played through YouTube's embedded player.