No one has commented on Turisas yet? The band that self-proclaims they are the pioneers of the battle metal genre? Okay then, here we go...
http://www.youtube.com/watch?v=Ift85e38H3M
http://www.youtube.com/watch?v=WIwBsL4KrFw
Also, I didn't see any Ensiferum (I didn't listen to all of these because I know a lot of them) so let's get some of them too
http://www.youtube.com/watch?v=lfrYkpa3770
http://www.youtube.com/watch?v=nQ1h8-AZfLI
If I'm traveling a lot I listen to easier stuff, usually baroque period like Vivaldi, Robert De Visee, Bach, etc. I'll add a few clips of them.
Robert De Visee:
http://www.youtube.com/watch?v=qeUcGD4rRRc
Bach:
http://www.youtube.com/watch?v=vDQ90qmyaMY&feature=fvst
Vivaldi:
http://www.youtube.com/watch?v=nGdFHJXciAQ