The Audio-Technica AT2020USB PLUS Cardioid Condenser USB Microphone is the absolute BEST affordable microphone for a measly $119. For good mic's this is cheap and you can actually get the exact same microphone in XLR version for only $79, but if you actually need it to record on a computer, then you need an XLR cable and an audio interface such as the Focusrite Scarlett Solo (2nd Gen) USB Audio Interface with Pro Tools | First.
Since you probably don't have all that stuff ... you can save alot of headache by just spending the exra $40 bucks and get the USB version that just clicks in and goes.
And that would be this Bad Boy right hur..
Why do I need this for making Rap/Videos?
Let's be honest. If your making rap and you're unkown or underground, then chances are that your are a close to broke (a starving artist).. This microphone does not come from the electronic section at your local Dollar General. This is the low end of the High End microphones.
What does it do?
The Audio-Technica AT2020USB PLUS Cardioid Condenser USB Microphone is a high quality made piece of equipment from Japan, who are known for producing great audio mic's. All metal construction and has a nice weight to it. Comes with USB cable, desktop mic stand and mic stand adapter for setting it up to a bigger rig if you have your own. It also comes with a standard headphone port so you can hear directly how you sound during recording.
How does it Sound?
It has a nice full frequency response. The mic itself produces practically zero additional static noise so its you that is heard on the track and not the mic itself. The mic has a front facing audio range and blocks out sounds that come from behind it or from the sides to cancel out as much interfering noise as possible. Best for Podcasts and Music recording. I don't think you can beat this mic for the price.
Make sure you get the USB Plus version and stay away from the XLR version unless you have the rig for it.