Watch the following videos:
Video #1: https://www.youtube.com/watch?v=Hg8zBJ1DhLQ
Video #2: https://www.youtube.com/watch?v=hDJdkcdG1iA.
Video #3: https://www.youtube.com/watch?v=jtCsoEw3Ykg
Video #4: https://www.youtube.com/watch?v=LFnewuBsYiY
Video #5: https://www.youtube.com/watch?v=-I23qGB6JdY
What did you learn from Video #1?
What did you learn from Video #2?
What did you learn from Video #3?
What did you learn from Video #4?
What did you learn from Video #5?