Creating a Third Person Controller from the scratch.

This is a tutorial video. (For want of better words.. Actually, it is about "Let's do it together, and go thru the issues we face and how I solved it").
Not that there are dearth of tutorial videos, This is just about sharing my experience (And the knowledge gained). Personally, I don't believe in just copy-pasting someone else's code. I'd want to write each line of code so that I can understand it better, so that I can debug / fix it when tomorrow I'd get into issues. I'm also addressing some commonly faced issues like the Grounding / perpetual falling, crouch, Weapons clipping thru walls, arming/disarming/using sword, bow, etc..
For Newbies, I hope you'd learn something. For veterans, I request you to kindly share your experience, on how something could've been be made better.

https://www.youtube.com/playlist?list=PLZZeKyBpbMHE2tTdp8jmvmfW71Ayn9EYx

(I guess it is OK to copy paste YouTube link here)