or guitar being played, like if i want to buy a certain type of guitar i can go to that site and they'll have videos?
like a video for this guitar http://www.guitarcenter.com/shop/product/buy_fender_standard_stratocaster_electric_guitar?full_sku=103576708
This guy appears to be playing a MiM Strat:
http://www.youtube.com/watch?v=Fn0v8r7T7-c
http://www.youtube.com/watch?v=EEY5f4ZvHRM
So is this guy:
http://www.youtube.com/watch?v=ERysfkgHqH4
And here:
http://www.youtube.com/watch?v=9bcfAtcsCAs
You should go to the music store and try one yourself. If you are good enough yet to put it through its paces, ask another customer or a salesperson to play it for you, so you can hear it.
Be careful about listening to it because a lot of times the feel of the guitar is just as important as its sound.
If you are not skilled enough to know what a good guitar feels like, don't buy it.