Common law systems:

https://www.youtube.com/watch?v=1_ecJOUlHCY

Civil law systems: 

https://www.youtube.com/watch?v=qYC_cfIsq0A

Sharia law in Saudi Arabia:

https://www.youtube.com/watch?v=71iufnsRa-0

Legal world is not flat:

https://www.youtube.com/watch?v=FS0U-mcs0Mo