This song by Xandria, Call of Destiny. If this lead singer does not have an opera background I would be shocked. Based on comments from other videos they are a symphonic band.
I noticed this is from Napalm Records who does Exit Eden songs. I need to research this record label.
Oh here is their wiki page they are a German Symphonic Band. They seem to have gone through a few lead female singers. Wagner would be proud.
Any American Symphonic bands? Evenance seems to be closest.