Contacts... yes... web favorites... probably... pics and video... not if they are on your SD Card... just pull your SD Card before you enter the 10 incorrect password.
Before we get all crazy with wiping the device, there are a few common simple things to check..
1. check to be sure that the sym-lock or cap-lock is not enabled.
2. when it prompts you to enter "Blackberry" enter your password as you think it is, and be sure that all characters appear correctly as the characters will appear in plain text.
3. If you're an enterprise BES user, ask (kindly) your BES admin to reset your password wirelessly.