The video assumes the Tesla semi weighs the same as a traditional diesel semi. Tesla doesn't seem to publish the weight of their Semi, which is awkward.

Most of the weight is likely going into the frame and structure of the tractor.

I just copied "Diesel engine, transmission & drivetrain" and "weight" into Google and this is what the search revealed. Maybe this could be helpful?

https://dieselsales.com/diesel-engine-and-transmission-weigh...

Wikipedia has you covered: https://en.wikipedia.org/wiki/Power-to-weight_ratio