HELP! My ear is suspect and I found a couple really cool short riffs and was hoping you could tell me the basic chords!!

I believe this is 4 chords, maybe starting on 'A' minor or major---it seems to sound okay with the A blue scale:

http://www.youtube.com/watch?v=2InAWIpP348


This one may even be in the same key?!


http://www.youtube.com/watch?v=FKNdfwBSf4Q

Thank you! I'll be playing solo at a restaurant near the Eaton Centre this month,if you want to take me up on my offer!!!

: )

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