I am still very new to aviation so this may be a silly question...

I'm being instructed to use QNH on take off and QFE on landing, this makes sense to me because it's handy to know where 0ft is when your approaching a r/w.
A video on these forums shows a pilot landing with 300ft still on the AI, which suggests he is still using regional QNH. Is this normal practise, is it a UK specific thing to use QFE?
<EDIT 1> I understand I should have said QNH and not Regional QNH
<EDIT 2> This thread could now also be titled, how to fly with QFE and not die!
Cheers
Sparky