What is power/load flow analysis?? Why Swing, PV, and PQ buses?? Why numerical methods are used??

In this video, I tried to explain four major points related to power flow analysis, without going into mathematics. First, the basics of power flow and its importance. Second, I explained "From where the different types of buses (like Swing, PV, and PQ) come into the picture. Third, why do we use the numerical method only to solve power flow equations? Fourth, I presented a small visualization of the gauss seidel numerical method to give you an idea about how numerical methods work. Link to the Power Flow video with complete mathematical derivation: 1. This is nptel lecture series, it is very slow but extremely conceptual for undergraduates, go to lecture #16. https://www.youtube.com/playlist?list=PL36A60B630E8C7B56 2. Go to lecture #26 of this playlist. https://www.youtube.com/playlist?list=PLRWKj4sFG7-6gWwDMLI0Wy5DDRqyKP1uQ 3. Follow this playlist if you want to build a power flow algorithm in programming. https://www.youtube.com/playlist?list=PLbSEVsipX-JRnyo8DjIiPGVP3FbTBo6Ap