I saw this video and several others like it, all claiming that the glowing substance created in the microwave is indeed plasma. To my (limited) knowledge on the subject, plasma is just an ionized/electrified gas. However, others say that there is no way the substance could be plasma, as real plasma would be millions of degrees and melt straight through the glass and microwave. Is the substance created in the microwave real plasma? And if not, what exactly IS it?