Thanks all, I want it so that I can check for focus and also see what everyone else will see. Obviously the 700D has a flip out screen but that would be way to small for me to be able to see in most occasions!
Also, I will be showing a lot of things in my videos so want to make sure that they are in the shot.
Thanks @James Strange I was just saying to my husband that it would be useful if I could use my tablet instead. I have a Samsung Galaxt Tab so I'll definitely check those out! Do I need any special cables?
If you have a tablet you could look into using that as a monitor: