register activation no automatic

hello, I do not speak English, I am using the google translator.
I recently installed the first theme Video theme.
and I have a little problem.
I want new users to register, have to be activated by me, the web administrator.
now if a new user is registered, your account is activated automatically, and access the videos, can be when they register, remain pending, and then manually, turn them one by one, and once activated , you can see the videos?

it is for a web of a very small guild.

I will not do it, and how everything is in English, do not understand me theme options, is somewhat complicated. as not English, the sample videos do not help me much.