Introduction to Homotopy Theory- Part 4: Fibrations

Wow! This one was a lot more detailed than usual, so I'd really recommend going through the proofs with the nLab in hand. I tried to elucidate some of their explanations, but it's still good to have both, so hopefully in between both of our presentations you can find understanding.
And as always, leave any corrections or questions down in the comments!
Credits:
nLab:
ncatlab.org/nlab/show/Introdu...
Animation library:
github.com/3b1b/manim​​
Music:
► Artist Attribution
• Music By: "KaizanBlu"
• Track Name: "Remember (Extended Mix)"
• CZcams Track Link: bit.ly/31Ma5s0​​
• Spotify Track Link: spoti.fi/2NUH3xZ