You can report the video.

But to be blunt, I wouldn't really worry about it. Most people don't pirate, and trying to chase pirates down isn't exactly going to convert them to paying customers as they're not the type to buy it anyways.

Do frequent smallish updates to add QoL options, bugfixes, etc. (As you should be anyways) This will make the store version superior and making pirated copies obsolete and require new versions to keep up. Obviously additional Steam features are valuable here too as you don't quite get those in alternate versions.

I've demoed my games at conventions and had people tell me to my face that they're going to pirate my game. I'd offer them a free key instead and one guy said he'd prefer to pirate it, so idk some people are just extra.