I don't love how when someone in China, a country with a billion people, misuses/uses a service cleverly it's a "Chinese dev" and an attack but when it's something that actually breaks npmjs like the everything package it's just some guy like US devs aren't bragging about their "filesystem over YouTube" implementations with blog posts on HN.
perhaps not terribly relevant to this case, but i remember some videos making the rounds over discord that would crash the app. i think in the end it wasn't malicious, but its not unreasonable to worry that if a video file can cause an app to crash, then what else can it do?
a properly crafted mal-media file will function as media, and carry a payload of malignant code. you only need to be comfortable manipulating headers, and data structure.