I was on YouTube and decided to watch "Did you know Gaming". I realized that some of the figures they used were from vgchartz.

Curious, but do you need permission at all to use any information from vgchartz, or is one allowed to go ahead and use it without asking?

Thanks to anyone who answers 

Why would someone need permission to state a number?

I doubt it. If vgc requires permission for numbers, they wouldn't display it in the front page of a publicly available site...

It's public information, available to anyone. The only case I could see being a problem would be using VGC Pro numbers (which are private, and behind a paywall), or blatantly calling those numbers as your own source instead of crediting VGC.

The Know also uses vgcharz numbers every once in a while.But since you can see the numbers free of charge, and is simply information about another product, I think there is no problem.I mean, if that was the case, every time a video were to use a sales number from an official source, do they need to ask for permission to the companie?Since thats not the case, i guess you could apply the same to here.

It's public information. Of course you don't need permission to use public information. It's always courteous to reference where you got the information from, though.

"Our sites include a combination of content that we create, that our partners create, and that our users create. All materials published on our sites, including, but not limited to, written content, photographs, graphics, images, illustrations, marks, logos, sound or video clips, and Flash animation, are protected by our copyrights or trademarks or those of our users and partners. You may not modify, publish, transmit, participate in the transfer or sale of, reproduce, create derivative works of, distribute, publicly perform, publicly display, or in any way exploit any of the materials or content on our sites in whole or in part without obtaining our consent first and without including a reference citation so that it is clear that the works are derived from our sites. If you would like to request permission to use any of the content on our sites please contact admin@vgchartz.com."

Would apply to the numbers.

This.