It's ok, we know you were on vacation.

possible new candidate for a room temperature superconductor, also its apparently really easy and cheap to make. Would eliminate a lot of inefficiency from power transmission, generation, and storage (im a layperson, not qualified; i just think its neat and probably got something wrong)

here

May be referring to this: https://www.tomshardware.com/news/call-to-pause-superconductor-experiments-parodies-open-letter-to-pause-ai-experiments

Then the letter quickly establishes its case for caution, pausing superconductor experiments that could cause astonishing challenges. It asserts that the worlds of physics and technology could be changed forever, and this is backed by “top scientific institutions and Russian anime cat girls.”

Russian with a cat girl profile picture has been working on replicating this, posting their progress on Twitter

it's unclear

I believe it's referring to this person https://twitter.com/iris_IGB

Which is also part of the cliché.

Source? I didn't see that yet

It seems like it's just one of the early videos that was fake, made coast on the existing story. Or I misunderstood?