What Metal Is This In The Video

My guess is its the shavings from cutting the cat off. Another possibly would be aluminum or some other metal blown from or through the engine and trapped in the cat. Did you try a magnet? (sorry I didn't hear the audio part)

Based on as through a chemical analysis as can be done by looking at images posted on the internet, I can definitely state that what was shown in those
images is a pile of gunk and crap from the inside of an old, junked catalytic converter. This pile of gunk and crap most likely contains trace quantities of a
good number of different metals, metallic compounds and non-metallic compounds.

A more detailed and specific chemical analysis would require bringing that pile of gunk and crap to some sort of professional chemical laboratory which is fully
equipped with incredibly expensive chemical analysis equipment and staffed by graduate chemists and metallurgists. A lab like that will charge you an arm and
a leg to do a complete and professional chemical analysis of the pile of gunk and crap, but the specificity and detail of their analysis will be infinitely better than
what can be determined by somebody looking at images posted on the internet.

There are regrettably no easy, quick and worthwhile answers to your question that can be provided based on internet-posted images. What you're trying to
play with here is a complex, professional-level industrial situation that doesn't translate very well to an unprofessional, kitchen table level of treatment.

If making money by harvesting junked catalytic converters is your dream, then collect at least a few hundred of them and drop them off (without breaking them
open) at a metal recycling operation. You'll be fairly well-paid for doing so at that level. Pulling the gunk and crap out of one or two old junked converters and
trying to sort it out on a kitchen table won't end up getting you any money.

One closing thought -- the practice of playing with exposed piles of unknown chemical gunk and crap on your kitchen table may not be the best of all possible
ideas in terms of environmental health and safety. You have no idea what you're exposing yourself to and there might well be health hazards involved. But --
if playing with unknown chemical exposures without any protection on the table where you eat your meals is what floats your boat, then go for it and best of luck!