It's actually very serious to steal IP addresses, as it can be used to commit fraud and identity theft. I doubt SH03L4C3 is a criminal mastermind, but be careful who you give your IP to.
Also, the IP address won't tell you someone's PC specs
I'd recommend finding out what a link is before opening it unless it's from a trusted friend. Even if it's an email from "Amazon", or "Apple", scammers will often fake things like that. The easiest way to figure out what a link is when you're on a webpage is to use Inspect Element(you can Google how to use it), which will show you where a link will take you.
Why would someone in your class need that information? Second, why can't you just copy/paste the YouTube video URL? Any ways, I've received emails saying my Netflix and apple account missed a payment/was locked out, and the thing looked legit. Logos, formal grammar, etc. I checked the sender address, and it turns out it was some random letters and numbers, so it was a scam.