I do not know a lot about the technology, but I remember reading that the hyperloop is not a full vacuum, just a lower pressure environment. That alone means all these videos are bunk themselves.
Thinking through this a little more. In basic terms, you just need a tunnel big enough combined with low enough pressure that at speed, the train has significantly less air to push out of the way. I'm sure it is some complex math, but someone who understands the math could figure it out.
Just running a tube between two cities of different elevation might allow for zero energy transport of small pods.
Zero pressure(perfect vacuum) is impossible to do in life. So what these articles/videos mean by vacuum is sufficiently low pressure that can reduce drag and that is essentially impossible to do across a tube of any meaningful size.
If your goal is low pressure, low cost, and high speed then build an airplane. No tracks required, no vacuum pumps required, no permitting required.