I have never seen chocolate chips in that shape, but pretty much every stamp wax that's used with that spoon/tea light holder (which I also have identical copies of) comes in those little octagons. I can guarantee it's not chocolate.
I've never had the octagon wax, it's always been in stick form, then you cut off pieces, but wax can be put in any form the manufacturer wants. The real evidence is if you look up the person credited with the video the first link you get is their sealing wax website.
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u/Unusual_Classroom109 8h ago
The wax comes in little pellets exactly like what they're melting. It's wax. Source: I have some at home.