Subway to Sally

I have started my discovery of German underground music by listening to Subway to Sally. It is clear to me from the streets of Wuppertal that metal is big in Germany. I tried one song on youtube, because this band were described as Medieval metal, and this seemed interesting enough to try.
The video looks cool, but the sound is not so special, but perhaps I should try more than one track.



 OK, from the live video I can now hear why it is called Medieval metal. But is it prog?
I like these guys more now.