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No it's not, there's no spool. It's tungsten electrode, inert gas. Feed wire and electrode diameters are, like, 0.3mm

You're right, I see in the video he has a filler rod and tungsten electrode.

Why is it ok to touch the tungsten to the silver, when it isn't ok to touch it to steel?

Reading the manual it looks like it automatically pulls the electrode back away from the workpiece after the arc is struck.