I watched the video, it is well made and a good ad for Texas.
There is this joke that to live in California, you got be either a millionaire or homeless...

I have myself been considering the idea of moving from California (taxes, cost of living and gun laws are horrible). Last January I had 43% of taxes/discounts on my salary, it makes you wonder if you are working for yourself or for the government.

Going back to the video: its basic premise (i.e. liberal policies are bad, conservative policies are good) doesn't explain the sorry state of things in California.
You got dig a bit deeper and go back to the 70's and 80's. The root of majority of current problems (i.e. homeless people, high cost of living) is in great part due to proposition 13.
To learn more about it:
https://en.wikipedia.org/wiki/1978_California_Proposition_13It works great on paper: it fixes the cost of real state taxes to 1% of the price paid in the property. The idea was to help elderly people who live on Social Security.
It was later amended to pass this 'tax grant' to the following generations, so you keep the 'family house' within the same family.
Sounds good right? Main issues are:
a) It is never updated to the current market value of the property.
b) It creates an incentive for people to never downsize their homes (why sell and buy something smaller if you end up paying more in real state taxes in the smaller house that was paid market price?).
c) People who don't even live in California anymore but inherited property got the tax break (and their kids will also have it and so on...).
As a result, you create 2 categories of people:
- the ones who got pay taxes (i.e. anyone who bought a home in the last 10-15 years paid 3x-10x more than way back in the 70's-80's, inflation factored in) a.k.a. peasants
- the people who get the eternal tax break (and so their future generations) a.k.a. noblemen
Sounds pretty medieval, right?
That coupled with local councils that never approve new development results in no new homes ever being built in California.
This drives rental prices up, thus the cost of living.
The primary reason why business are closing is that they got pay a lot to their employees, otherwise the employees can't pay rent. The overegulation (labor/zoning/etc) certainly doesn't help.
The primary reason why there are so many homeless people is that majority of workers are just one paycheck away from loosing everything and end up living in the streets.
Heck! There are people who have jobs but can't afford rent and sleep in their cars.

Proposition 13 was approved while California had a Democratic governor and expanded under a Republican governor.
It is not partisan, but it is political: no professional politician/elected official will dare to touch it, as they risk to loose votes of 'noblemen' who benefit of the tax break.
There are a few proposals to make it more streamlined the approvals for real state development, but there are many powerful forces fighting against it (i.e. councils, representatives, real state companies, etc).
In conclusion: bad policies (either liberal or conservative) can have a bad impact on the lives of people. The root of the current problems of California derives of well intended policies and lack of courage to fix the mess.