Plug welding with an arc?

In this video: The topic of the day is plug welds, what exactly is a plug weld and what can it be

For speed and strength, at least in thicker material, stop the tab at the mid point thickness of the slot and fill with a hot plug weld In 3mm

plug slot weld Butt Joint Welding · Flare-V-groove weld; Flare-bevel-groove weld ; Tee Joint Welding · Fillet, slot, and plug weld; J-groove weld ; Corner Joint

plug slot Explanation: A plug or slot weld is a type of weld specifically used for joining overlapping metal surfaces or sheets, characterized by the way