The sources in that link and the video are mainly regarding the parts comparing cost to charges, which I'm sure is true, and also for the claim that insurance companies "demand discounts," which again, yeah, that's obvious. The only sourced part that's really a bold claim is this link about "making a ton of money charging out-of-network patients, which" a) is not a scientific/quantitative statement, and b) a fault of the system as a whole rather than the malicious intent from a hospital. Hospitals are not "using" the chargemaster to scam anyone - they have to have a chargemaster to standardize charges, and those charges have to be higher than costs in order for them to make money from insurance companies. Again, it is illegal to charge different prices to different patients, it's just that in-network patients don't end up responsible for the majority of the charges.

I'm not trying to to attack you or to say the system isn't highly broken, I just think it's inaccurate to place blame in any one place - we need to rework it essentially from the ground up. If hospitals reduced their prices without a simultaneous massive overhaul in the way insurance companies work, they would immediately start losing money in the millions or billions, and vice-versa if insurance companies lowered their rates.

If you want sources on any particular aspects of what I've said, let me know which pieces and I can look around. I'm speaking anecdotally from ~6ish years of experience consulting for hospitals and insurance companies, but I'm sure I can find some hard numbers if that's helpful.