How long does a Tesla battery last ? | Battery degradation & longevity

This excellent video by Matt attempts to address some of the most frequently asked questions of every Tesla (or any EV) driver: 

• how long does a Tesla battery last for? 
• How many years do Tesla batteries last?, 
• How much does it cost to replace the batteries in a Tesla?
• Why you should not compare the operation of smartphone battery against electric vehicle battery?
• ..and many more practical questions.