How does it explain the consequences of special relativity - time dilation, length contraction, relativity of simultaneity, and more.

Chapters:
00:00 Intro
01:25 A 2D analogy
04:15 How to validate? 
07:08 How Pythagorus helps
08:40 How to piece a website (Ad)
10:15 Speed in 4D spacetime
13:30 Why length contracts along motion
16:30 Simultaneity & clock desynchronisation
18:17 Revising the Twin's 'paradox'
19:36 Why 3 spacial dimensions & 1 time dimension?