Can you discern these chords?

I'm having limited luck figuring these chords out. Does anyone have a good enogh ear for it?
Thanks.

http://www.guitar.com/video/great-practice-routine-using-chords#comments-anchor

I only briefly watch but there drop 2 & 3

http://www.jazzguitar.be/drop_2_chords.html

funny thing when trying to find a chart for the drops I found this

http://www.youtube.com/watch?v=g1wrLeR7mDA

which lead to this

http://www.youtube.com/watch?v=B1Ux0n1glZs&feature=relmfu

and this

http://www.youtube.com/watch?v=YIyaNVe0SH0&feature=relmfu

the guy's good watch em. very important to know your drops

Thanks for the tips!