Hi,
To create our training courses, the use of the correct microphone is critical. When I began my journey on Udemy, I invested in the Blue Snowball USB Microphone. It is outstanding and works superb even today after six years of its regular use. I use it to record audio lectures.
With that said, as I progressed and started using a DSLR camera, I required another microphone that could connect to the camera. So, I purchased the Rode Video Mic Pro+. Its a compact directional shotgun microphone with an outstanding sound quality.
Some details of both these microphones are as below:
Blue Snowball iCE USB Mic for Recording and Streaming on PC and Mac, Cardioid Condenser Capsule (Price ~$40 on Amazon)

Rode VideoMic Pro+ Compact Directional On-Camera Shotgun Condenser Microphone (Price ~$265 on Amazon)

Which microphone do you use to record your video lectures? Share your thoughts.