Well, since I've got no money to invest at the moment - and also because I'm not that experienced in YouTube yet - I use my daily headphones, Sony MDR-V5, which have almost 30 years (yes, they're quite older than me - 1985). In the end, they're really really good, have great sound and although after an hour of using them my ears are "flat", I really like them. Also, with some duct tape (again, I know it's not ideal, but it works pretty fine) I have a $3 microphone.