They both types send torque to both wheels. That video is most likely showing lift off oversteer then any specific differential issue, but it's hard to tell anything from it really. Those nose dive accidents are driver error of applying too much power too early in a rear drive car not the type of differential.
Helical, very linear engagement and predictable. No adjustment to engagement what you get from the mfg is it. Low noise compared to clutch type. Little to no maintenance.
Clutch, adjustable engagement to suit every event. You want a quick lock up you can set it, less aggressive you can set that too. It is noisy especially with low speed cornering. Regular maintenance needed, fluid changes, clutch changes. Not really an issue if you constantly taking it apart to adjust it.
https://www.kmpdrivetrain.com/differ...-differential/
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