This is actually not a Samsung flaw, but FLAW OF BATTERIES IN GENERAL FOR YEARS!
I am doing a device repairs for 15 years and i can tell you that literally ALL electronic devices with "pouch type Li-Ion/Li-Polymer" batteries suffer from this so called, shocking sound "fatal issue". I would only call it an another way how to make a cool video to get views and attention.
Its actually a normal thing that battery, especially when laying for a long period with already worn chemistry does this. I saw this several times also in old HTC, Asus, Apple even Nokia 33xx/34xx non-smartphones and many many brands. I dont think I saw any brand that actually didnt have this issue.
Pouch cells dont have a safety vent to prevent this to happen (unlike metal can types like 18650). Its also reason why these cells are not much used in industrial and other high-rel devices.
This known problem just goes worse and comes earlier for the smartphones because ther batteries have high density cells that are actually tortured by extreme heats and lot of cycling (remember the chemistry degrades faster above 40C and is still limited to 300-500 cycles). Not to mention the trend of all those insane Fast Charging. Like charging phone by 60W? Charging by these currents are multipliying these torturing conditions already present in smartphones. I disable Fast Charge on all phones I had (thank you Samsung for giving option to disable that), and my phone batteries last much more than my friends with same models.
Thanks god, that Samsung is not following this trend yet...