Some good answers on “what is a flame”, but if you really want to see plasma look up videos of Tesla coils or a Jacob’s ladder or one of those electric balls where you touch it and the electricity arcs to your hand (or if you’re lucky and live near a Science museum you may be able to go see them in person).
The glowy filaments you’re seeing aren’t electricity itself, it’s the air turning to plasma as electricity passes through it. In a similar vein, a lightning bolt while caused by electricity isn’t really electricity: the visible bit is plasma created from huge amounts of electricity passing through the sky
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