So basically I now use a crt monitor (an Amiga 1080 or something) and it's really good, but I need an av splitter, but all the ones I found say they're not very good for recording. I only need a 1 in 2 out (and would prefer that) so what are the best ones? (Also I'm avoiding unpowered splitters, because 1. they look worse and 2. They generally have lots of input lag)

http://amzn.to/2zIqEaj

I used that for years before moving to a Component setup. It’s flawless.

Seconded! That's the same one I use and it's great! No input lag.