That video is showing someone (presumably you?) scrolling through the date picker. It does not appear to provide any evidence to support your claim that the device resets to 1970 when it cannot get a response from NTP. As I said before, literally no device would ever behave that way, because not being able to get an NTP response is not a particularly uncommon occurrence (it happens any time you don't have internet), so any device that reset to 1970 would be extremely obviously broken as literally every single person would hit this many many many times.