Best Mobile (VIDEO) ad networks?

I've been looking around at different mobile ad networks that are focused on video ads. It's hard to find specific numbers on CPMs for each ad network. Thus, I was wondering if anyone knew which ad network has the best CPM rates?

I've seen that millennial media has $10--$35 CPM for Video ads.

Other mobile video ad network's I've looked at: Vdopia, AdColony, Vungle, YuMe, & MobFox.

Any help or guidance would be great!

Thanks,

CC