Video1: Vectors and Scalars
https://www.youtube.com/watch?v=ihNZlp7iUHE&list=PLAD5B880806EBE0A4
https://www.youtube.com/watch?v=ihNZlp7iUHE&list=PLAD5B880806EBE0A4
Video2 : Average Speed and Average Velocity
https://www.youtube.com/watch?v=oRKxmXwLvUU&list=SPAD5B880806EBE0A4
https://www.youtube.com/watch?v=oRKxmXwLvUU&list=SPAD5B880806EBE0A4