I was trying to figure out what the chords were for the acoustic version of "I Write Sins Not Tragedies" by Panic! At The Disco

Specifically from this video: https://www.youtube.com/watch?v=JPMzRAqrv9o

I have some of it, but I'm pretty new to guitar and can't tell if its in standard tuning either. Can someone help me out? I just need the chords
It isn't standard that's for sure. Could be half step, or whole step down.