Yeah, they went with a good choice with Caitlin Glass for Cammy. But Wendee Lee, while being a great voice actress, just doesn't seem right for Chun Li. A bit too much on the high-pitched, perky side.
Half of the rest aren't bad, though. Digging Ken's cockiness (it's DMC's Dante!), and Rose and Vega sound pretty good, too. Honda, Dhalsim and Sagat all appear appropriately voiced, and Zangief and El Fuerte are excellent in an over-the-top way. And I could never get used to Guile's Japanese selected Engrish, so I figure he's gotta be better in native English.
But I think the most important thing we could take out of this video is that it fully confirms who everybody's rival matches are, since these voice clips appear to be taken during those particular sequences. So, with the help of Neogaf's compilation:
Ryu <-> Sagat
Ken <-> Rufus
Guile <-> Abel
Honda <-> Dhalsim
Zangief <-> El Fuerte
Blanka <-> Balrog (Boxer)
Chun Li <-> Vega (Claw)
Viper -> Chun Li
Bison (Dictator) -> Viper
Akuma -> Ryu
Gouken -> Ken
Cammy -> Viper
Sakura -> Ryu
Dan -> Sakura
Fei Long -> Abel
Rose -> Ryu
Gen -> Chun Li
Seth -> Guile/Bison (Dictator)