These videos mostly either deliberately mis-state or overstate the issues - try some fact checking for once. They are made by someone who makes money by stirring controversy to push up his video views and make money and "debunking" hyperloop is a massive cash cow for him. He started off with fairly reputable science analysis but over the years moved to more emotive/controversial topics as these made him money.
A lot of the arguments in the video are based on the "alpha document". The document itself points out it is about ideas and not detailed either in engineering or physics analysis - just a starting point for detail to be added later and ideas to be used or discarded with further analysis. It is not a fixed blueprint for the final design.
SpaceX/Hyperloop themselves say "low pressure" and not "vacuum" - the pressure in the tubes is expected to be around the same as a jet plane experiences which is easy to maintain compared to a hard vacuum. The 99.9% vacuum that is often stated did not offically come from Hyperloop but is a figure that was mentioned as a "possible/maybe" very early on by latched onto by the media after one person gave an off the cuff remark.
Low pressure will be less force on the walls compared to what is stated in the videos.
The crossbraces shown in images of the pipes are for transport/lifting support where there will be uneven forces (not the same as the even pressure forces once sealed) and once the pipes are joined and mounted are not needed.
The mythbusters experiments showed that they had to do *significant damage* for the tanker to collapse and tankers have much thinner skins than the hyperloop track does.
Sudden shock point pressure on a surface/material/tube is not the same as constant or slowly changing uniform pressure.
Sealed expansion joints are a many times solved thing for low pressure systems and long pipelines even on the scale we are talking about for hyperloop.
As are station "airlocks" and emergency air for passengers
The crash/failure would not be as stated because 1) low pressure not vacuum and 2) vehicles will not be tight to the walls as in the youtube glass tube experiments.
Cars being pushed then released on a surface lose speed due to friction once not being pushed - surprise! Physics working as expected. The competition was about an effective shape of the pod in low pressure in the tube and not about propulsion/drive/levitation/wheel friction for the final system. Also is it a surprise that a very short test track can't reach the speed in 10 seconds AND THEN STOP safely before hitting the end where the speed of a full scale system could over several minutes of acceleration over several dozen miles?.