[ViewTrick1002]

Hypermiling is a known method for extending the range. That is why standardized tests are important so you can match the standardized number to your driving.

A livestream is hard to fake but what tires were they using? What was the climate control setting? What speed? Did they have a tail wind?

https://en.wikipedia.org/wiki/Hypermiling

[tooltalk]

  The maximum speed was caped to 90 km/hour (56 miles/hour), and the energy consumption was 13.2 kWh/100 km. The average speed for the trip was 83.9 km/h.

so there it goes, driven at an average speed of 53 mph hypermilling! For comparison, Tesla M3 achieved 975km:

  In May 2018, Sean Mitchell and Erik Strait set a hypermiling record for the Tesla Model 3 by driving 606.2 miles on a single charge after 32 hours of driving.

[Interesco]

For comparison, the Tesla Model 3 was travelling at an average of 18.94 mph

[tooltalk]

Sure, the M3 also has 1/3 less battery capacity too.

[adrianN]

They give you most of that information in the article.