https://en.wikipedia.org/wiki/Power_metal
I just personally feel it's not PM unless there are keyboards and a much more symphonic, often orchestral feel to the music. There's nothing to say that's right, but I'd definitely categorise this more as traditional heavy metal than anything else. One thing we can agree on though: it's pretty bog-standard fare, yes? As for the definition, I guess we need to ask the Oracle, when he drags himself out of his pit. Yo! Batty! Your expertise is needed here!