XF 1.5 Questions on modifying the template



1. How to add the Hyper Links in the footer page
2. I have a video hosting script. I want to host few videos over there and want to post the video embeded link in a videos section in forums. how can i do this ?
Can i just copy the video embeded link and post in the forum as [video]embeded link[/video] or is there any other format
3. how to add Hyperlinks in header
4. I have Chevereto imagehosting script and hosted in another site. In every thread can i make users to upload images directly to the imagehosting site and then image should be displayed in the forum. can this be done ?