It is alright, for future refrence tony.
when watching a demo type this is console

sv_cheats 1
Mat_wireframe 1

what it will do is allow you to wee what they would see if they were wall hacking. You will be able to see the other players threw objects and walls all around the map, use this so avoid any confusion when you think someone may be wall hacking.



As for watchibng the demos bridge even easier is to put the demo in the folder pesdo said then to go into the console and type Demoui and a menu will pop up press load and load your demo