QUARKY PHYSICS
This video discusses the relativity of simultaneity. It shows how two events can be simultaneous for one observer and not simultaneous for other observers. The video also discusses a thought experiment to prove the relativity of simultaneity.
Lecture 01 (S.T.R)
https://youtu.be/bmIT8bCd5_I
Lecture 02 (S.T.R)
https://youtu.be/wKhRMRJmnzc
Source
Very well explained!👍