yes it will, but when done badly like shown its inevitably going to break... people dont always think straight when tired, cold and hungry though do they
That's like doing anything when tired, cold, hungry. A larger knife may mean you're more tired earlier or more dangerous to yourself. It's all part of learning though.
Many 3mm knives get batonned all the time but the reports of breakage are quite low so they must have a fair margin for error.